Dolibarr / dolibarr

htdocs/includes/webklex/php-imap/vendor/illuminate/collections/Traits/EnumeratesValues.php

Indentation +1065 added lines, -1065 removed lines

@@ -48,1069 +48,1069 @@
  */
 trait EnumeratesValues
 {
-    /**
-     * Indicates that the object's string representation should be escaped when __toString is invoked.
-     *
-     * @var bool
-     */
-    protected $escapeWhenCastingToString = false;
-
-    /**
-     * The methods that can be proxied.
-     *
-     * @var string[]
-     */
-    protected static $proxies = [
-        'average',
-        'avg',
-        'contains',
-        'doesntContain',
-        'each',
-        'every',
-        'filter',
-        'first',
-        'flatMap',
-        'groupBy',
-        'keyBy',
-        'map',
-        'max',
-        'min',
-        'partition',
-        'reject',
-        'skipUntil',
-        'skipWhile',
-        'some',
-        'sortBy',
-        'sortByDesc',
-        'sum',
-        'takeUntil',
-        'takeWhile',
-        'unique',
-        'until',
-    ];
-
-    /**
-     * Create a new collection instance if the value isn't one already.
-     *
-     * @param  mixed  $items
-     * @return static
-     */
-    public static function make($items = [])
-    {
-        return new static($items);
-    }
-
-    /**
-     * Wrap the given value in a collection if applicable.
-     *
-     * @param  mixed  $value
-     * @return static
-     */
-    public static function wrap($value)
-    {
-        return $value instanceof Enumerable
-            ? new static($value)
-            : new static(Arr::wrap($value));
-    }
-
-    /**
-     * Get the underlying items from the given collection if applicable.
-     *
-     * @param  array|static  $value
-     * @return array
-     */
-    public static function unwrap($value)
-    {
-        return $value instanceof Enumerable ? $value->all() : $value;
-    }
-
-    /**
-     * Create a new instance with no items.
-     *
-     * @return static
-     */
-    public static function empty()
-    {
-        return new static([]);
-    }
-
-    /**
-     * Create a new collection by invoking the callback a given amount of times.
-     *
-     * @param  int  $number
-     * @param  callable|null  $callback
-     * @return static
-     */
-    public static function times($number, callable $callback = null)
-    {
-        if ($number < 1) {
-            return new static;
-        }
-
-        return static::range(1, $number)
-            ->when($callback)
-            ->map($callback);
-    }
-
-    /**
-     * Alias for the "avg" method.
-     *
-     * @param  callable|string|null  $callback
-     * @return mixed
-     */
-    public function average($callback = null)
-    {
-        return $this->avg($callback);
-    }
-
-    /**
-     * Alias for the "contains" method.
-     *
-     * @param  mixed  $key
-     * @param  mixed  $operator
-     * @param  mixed  $value
-     * @return bool
-     */
-    public function some($key, $operator = null, $value = null)
-    {
-        return $this->contains(...func_get_args());
-    }
-
-    /**
-     * Determine if an item exists, using strict comparison.
-     *
-     * @param  mixed  $key
-     * @param  mixed  $value
-     * @return bool
-     */
-    public function containsStrict($key, $value = null)
-    {
-        if (func_num_args() === 2) {
-            return $this->contains(function ($item) use ($key, $value) {
-                return data_get($item, $key) === $value;
-            });
-        }
-
-        if ($this->useAsCallable($key)) {
-            return ! is_null($this->first($key));
-        }
-
-        foreach ($this as $item) {
-            if ($item === $key) {
-                return true;
-            }
-        }
-
-        return false;
-    }
-
-    /**
-     * Dump the items and end the script.
-     *
-     * @param  mixed  ...$args
-     * @return void
-     */
-    public function dd(...$args)
-    {
-        $this->dump(...$args);
-
-        exit(1);
-    }
-
-    /**
-     * Dump the items.
-     *
-     * @return $this
-     */
-    public function dump()
-    {
-        (new Collection(func_get_args()))
-            ->push($this->all())
-            ->each(function ($item) {
-                VarDumper::dump($item);
-            });
-
-        return $this;
-    }
-
-    /**
-     * Execute a callback over each item.
-     *
-     * @param  callable  $callback
-     * @return $this
-     */
-    public function each(callable $callback)
-    {
-        foreach ($this as $key => $item) {
-            if ($callback($item, $key) === false) {
-                break;
-            }
-        }
-
-        return $this;
-    }
-
-    /**
-     * Execute a callback over each nested chunk of items.
-     *
-     * @param  callable  $callback
-     * @return static
-     */
-    public function eachSpread(callable $callback)
-    {
-        return $this->each(function ($chunk, $key) use ($callback) {
-            $chunk[] = $key;
-
-            return $callback(...$chunk);
-        });
-    }
-
-    /**
-     * Determine if all items pass the given truth test.
-     *
-     * @param  string|callable  $key
-     * @param  mixed  $operator
-     * @param  mixed  $value
-     * @return bool
-     */
-    public function every($key, $operator = null, $value = null)
-    {
-        if (func_num_args() === 1) {
-            $callback = $this->valueRetriever($key);
-
-            foreach ($this as $k => $v) {
-                if (! $callback($v, $k)) {
-                    return false;
-                }
-            }
-
-            return true;
-        }
-
-        return $this->every($this->operatorForWhere(...func_get_args()));
-    }
-
-    /**
-     * Get the first item by the given key value pair.
-     *
-     * @param  string  $key
-     * @param  mixed  $operator
-     * @param  mixed  $value
-     * @return mixed
-     */
-    public function firstWhere($key, $operator = null, $value = null)
-    {
-        return $this->first($this->operatorForWhere(...func_get_args()));
-    }
-
-    /**
-     * Determine if the collection is not empty.
-     *
-     * @return bool
-     */
-    public function isNotEmpty()
-    {
-        return ! $this->isEmpty();
-    }
-
-    /**
-     * Run a map over each nested chunk of items.
-     *
-     * @param  callable  $callback
-     * @return static
-     */
-    public function mapSpread(callable $callback)
-    {
-        return $this->map(function ($chunk, $key) use ($callback) {
-            $chunk[] = $key;
-
-            return $callback(...$chunk);
-        });
-    }
-
-    /**
-     * Run a grouping map over the items.
-     *
-     * The callback should return an associative array with a single key/value pair.
-     *
-     * @param  callable  $callback
-     * @return static
-     */
-    public function mapToGroups(callable $callback)
-    {
-        $groups = $this->mapToDictionary($callback);
-
-        return $groups->map([$this, 'make']);
-    }
-
-    /**
-     * Map a collection and flatten the result by a single level.
-     *
-     * @param  callable  $callback
-     * @return static
-     */
-    public function flatMap(callable $callback)
-    {
-        return $this->map($callback)->collapse();
-    }
-
-    /**
-     * Map the values into a new class.
-     *
-     * @param  string  $class
-     * @return static
-     */
-    public function mapInto($class)
-    {
-        return $this->map(function ($value, $key) use ($class) {
-            return new $class($value, $key);
-        });
-    }
-
-    /**
-     * Get the min value of a given key.
-     *
-     * @param  callable|string|null  $callback
-     * @return mixed
-     */
-    public function min($callback = null)
-    {
-        $callback = $this->valueRetriever($callback);
-
-        return $this->map(function ($value) use ($callback) {
-            return $callback($value);
-        })->filter(function ($value) {
-            return ! is_null($value);
-        })->reduce(function ($result, $value) {
-            return is_null($result) || $value < $result ? $value : $result;
-        });
-    }
-
-    /**
-     * Get the max value of a given key.
-     *
-     * @param  callable|string|null  $callback
-     * @return mixed
-     */
-    public function max($callback = null)
-    {
-        $callback = $this->valueRetriever($callback);
-
-        return $this->filter(function ($value) {
-            return ! is_null($value);
-        })->reduce(function ($result, $item) use ($callback) {
-            $value = $callback($item);
-
-            return is_null($result) || $value > $result ? $value : $result;
-        });
-    }
-
-    /**
-     * "Paginate" the collection by slicing it into a smaller collection.
-     *
-     * @param  int  $page
-     * @param  int  $perPage
-     * @return static
-     */
-    public function forPage($page, $perPage)
-    {
-        $offset = max(0, ($page - 1) * $perPage);
-
-        return $this->slice($offset, $perPage);
-    }
-
-    /**
-     * Partition the collection into two arrays using the given callback or key.
-     *
-     * @param  callable|string  $key
-     * @param  mixed  $operator
-     * @param  mixed  $value
-     * @return static
-     */
-    public function partition($key, $operator = null, $value = null)
-    {
-        $passed = [];
-        $failed = [];
-
-        $callback = func_num_args() === 1
-                ? $this->valueRetriever($key)
-                : $this->operatorForWhere(...func_get_args());
-
-        foreach ($this as $key => $item) {
-            if ($callback($item, $key)) {
-                $passed[$key] = $item;
-            } else {
-                $failed[$key] = $item;
-            }
-        }
-
-        return new static([new static($passed), new static($failed)]);
-    }
-
-    /**
-     * Get the sum of the given values.
-     *
-     * @param  callable|string|null  $callback
-     * @return mixed
-     */
-    public function sum($callback = null)
-    {
-        $callback = is_null($callback)
-            ? $this->identity()
-            : $this->valueRetriever($callback);
-
-        return $this->reduce(function ($result, $item) use ($callback) {
-            return $result + $callback($item);
-        }, 0);
-    }
-
-    /**
-     * Apply the callback if the value is truthy.
-     *
-     * @param  bool|mixed  $value
-     * @param  callable|null  $callback
-     * @param  callable|null  $default
-     * @return static|mixed
-     */
-    public function when($value, callable $callback = null, callable $default = null)
-    {
-        if (! $callback) {
-            return new HigherOrderWhenProxy($this, $value);
-        }
-
-        if ($value) {
-            return $callback($this, $value);
-        } elseif ($default) {
-            return $default($this, $value);
-        }
-
-        return $this;
-    }
-
-    /**
-     * Apply the callback if the collection is empty.
-     *
-     * @param  callable  $callback
-     * @param  callable|null  $default
-     * @return static|mixed
-     */
-    public function whenEmpty(callable $callback, callable $default = null)
-    {
-        return $this->when($this->isEmpty(), $callback, $default);
-    }
-
-    /**
-     * Apply the callback if the collection is not empty.
-     *
-     * @param  callable  $callback
-     * @param  callable|null  $default
-     * @return static|mixed
-     */
-    public function whenNotEmpty(callable $callback, callable $default = null)
-    {
-        return $this->when($this->isNotEmpty(), $callback, $default);
-    }
-
-    /**
-     * Apply the callback if the value is falsy.
-     *
-     * @param  bool  $value
-     * @param  callable  $callback
-     * @param  callable|null  $default
-     * @return static|mixed
-     */
-    public function unless($value, callable $callback, callable $default = null)
-    {
-        return $this->when(! $value, $callback, $default);
-    }
-
-    /**
-     * Apply the callback unless the collection is empty.
-     *
-     * @param  callable  $callback
-     * @param  callable|null  $default
-     * @return static|mixed
-     */
-    public function unlessEmpty(callable $callback, callable $default = null)
-    {
-        return $this->whenNotEmpty($callback, $default);
-    }
-
-    /**
-     * Apply the callback unless the collection is not empty.
-     *
-     * @param  callable  $callback
-     * @param  callable|null  $default
-     * @return static|mixed
-     */
-    public function unlessNotEmpty(callable $callback, callable $default = null)
-    {
-        return $this->whenEmpty($callback, $default);
-    }
-
-    /**
-     * Filter items by the given key value pair.
-     *
-     * @param  string  $key
-     * @param  mixed  $operator
-     * @param  mixed  $value
-     * @return static
-     */
-    public function where($key, $operator = null, $value = null)
-    {
-        return $this->filter($this->operatorForWhere(...func_get_args()));
-    }
-
-    /**
-     * Filter items where the value for the given key is null.
-     *
-     * @param  string|null  $key
-     * @return static
-     */
-    public function whereNull($key = null)
-    {
-        return $this->whereStrict($key, null);
-    }
-
-    /**
-     * Filter items where the value for the given key is not null.
-     *
-     * @param  string|null  $key
-     * @return static
-     */
-    public function whereNotNull($key = null)
-    {
-        return $this->where($key, '!==', null);
-    }
-
-    /**
-     * Filter items by the given key value pair using strict comparison.
-     *
-     * @param  string  $key
-     * @param  mixed  $value
-     * @return static
-     */
-    public function whereStrict($key, $value)
-    {
-        return $this->where($key, '===', $value);
-    }
-
-    /**
-     * Filter items by the given key value pair.
-     *
-     * @param  string  $key
-     * @param  mixed  $values
-     * @param  bool  $strict
-     * @return static
-     */
-    public function whereIn($key, $values, $strict = false)
-    {
-        $values = $this->getArrayableItems($values);
-
-        return $this->filter(function ($item) use ($key, $values, $strict) {
-            return in_array(data_get($item, $key), $values, $strict);
-        });
-    }
-
-    /**
-     * Filter items by the given key value pair using strict comparison.
-     *
-     * @param  string  $key
-     * @param  mixed  $values
-     * @return static
-     */
-    public function whereInStrict($key, $values)
-    {
-        return $this->whereIn($key, $values, true);
-    }
-
-    /**
-     * Filter items such that the value of the given key is between the given values.
-     *
-     * @param  string  $key
-     * @param  array  $values
-     * @return static
-     */
-    public function whereBetween($key, $values)
-    {
-        return $this->where($key, '>=', reset($values))->where($key, '<=', end($values));
-    }
-
-    /**
-     * Filter items such that the value of the given key is not between the given values.
-     *
-     * @param  string  $key
-     * @param  array  $values
-     * @return static
-     */
-    public function whereNotBetween($key, $values)
-    {
-        return $this->filter(function ($item) use ($key, $values) {
-            return data_get($item, $key) < reset($values) || data_get($item, $key) > end($values);
-        });
-    }
-
-    /**
-     * Filter items by the given key value pair.
-     *
-     * @param  string  $key
-     * @param  mixed  $values
-     * @param  bool  $strict
-     * @return static
-     */
-    public function whereNotIn($key, $values, $strict = false)
-    {
-        $values = $this->getArrayableItems($values);
-
-        return $this->reject(function ($item) use ($key, $values, $strict) {
-            return in_array(data_get($item, $key), $values, $strict);
-        });
-    }
-
-    /**
-     * Filter items by the given key value pair using strict comparison.
-     *
-     * @param  string  $key
-     * @param  mixed  $values
-     * @return static
-     */
-    public function whereNotInStrict($key, $values)
-    {
-        return $this->whereNotIn($key, $values, true);
-    }
-
-    /**
-     * Filter the items, removing any items that don't match the given type(s).
-     *
-     * @param  string|string[]  $type
-     * @return static
-     */
-    public function whereInstanceOf($type)
-    {
-        return $this->filter(function ($value) use ($type) {
-            if (is_array($type)) {
-                foreach ($type as $classType) {
-                    if ($value instanceof $classType) {
-                        return true;
-                    }
-                }
-
-                return false;
-            }
-
-            return $value instanceof $type;
-        });
-    }
-
-    /**
-     * Pass the collection to the given callback and return the result.
-     *
-     * @param  callable  $callback
-     * @return mixed
-     */
-    public function pipe(callable $callback)
-    {
-        return $callback($this);
-    }
-
-    /**
-     * Pass the collection into a new class.
-     *
-     * @param  string  $class
-     * @return mixed
-     */
-    public function pipeInto($class)
-    {
-        return new $class($this);
-    }
-
-    /**
-     * Pass the collection through a series of callable pipes and return the result.
-     *
-     * @param  array<callable>  $pipes
-     * @return mixed
-     */
-    public function pipeThrough($pipes)
-    {
-        return static::make($pipes)->reduce(
-            function ($carry, $pipe) {
-                return $pipe($carry);
-            },
-            $this
-        );
-    }
-
-    /**
-     * Pass the collection to the given callback and then return it.
-     *
-     * @param  callable  $callback
-     * @return $this
-     */
-    public function tap(callable $callback)
-    {
-        $callback(clone $this);
-
-        return $this;
-    }
-
-    /**
-     * Reduce the collection to a single value.
-     *
-     * @param  callable  $callback
-     * @param  mixed  $initial
-     * @return mixed
-     */
-    public function reduce(callable $callback, $initial = null)
-    {
-        $result = $initial;
-
-        foreach ($this as $key => $value) {
-            $result = $callback($result, $value, $key);
-        }
-
-        return $result;
-    }
-
-    /**
-     * Reduce the collection to multiple aggregate values.
-     *
-     * @param  callable  $callback
-     * @param  mixed  ...$initial
-     * @return array
-     *
-     * @deprecated Use "reduceSpread" instead
-     *
-     * @throws \UnexpectedValueException
-     */
-    public function reduceMany(callable $callback, ...$initial)
-    {
-        return $this->reduceSpread($callback, ...$initial);
-    }
-
-    /**
-     * Reduce the collection to multiple aggregate values.
-     *
-     * @param  callable  $callback
-     * @param  mixed  ...$initial
-     * @return array
-     *
-     * @throws \UnexpectedValueException
-     */
-    public function reduceSpread(callable $callback, ...$initial)
-    {
-        $result = $initial;
-
-        foreach ($this as $key => $value) {
-            $result = call_user_func_array($callback, array_merge($result, [$value, $key]));
-
-            if (! is_array($result)) {
-                throw new UnexpectedValueException(sprintf(
-                    "%s::reduceMany expects reducer to return an array, but got a '%s' instead.",
-                    class_basename(static::class), gettype($result)
-                ));
-            }
-        }
-
-        return $result;
-    }
-
-    /**
-     * Reduce an associative collection to a single value.
-     *
-     * @param  callable  $callback
-     * @param  mixed  $initial
-     * @return mixed
-     */
-    public function reduceWithKeys(callable $callback, $initial = null)
-    {
-        return $this->reduce($callback, $initial);
-    }
-
-    /**
-     * Create a collection of all elements that do not pass a given truth test.
-     *
-     * @param  callable|mixed  $callback
-     * @return static
-     */
-    public function reject($callback = true)
-    {
-        $useAsCallable = $this->useAsCallable($callback);
-
-        return $this->filter(function ($value, $key) use ($callback, $useAsCallable) {
-            return $useAsCallable
-                ? ! $callback($value, $key)
-                : $value != $callback;
-        });
-    }
-
-    /**
-     * Return only unique items from the collection array using strict comparison.
-     *
-     * @param  string|callable|null  $key
-     * @return static
-     */
-    public function uniqueStrict($key = null)
-    {
-        return $this->unique($key, true);
-    }
-
-    /**
-     * Collect the values into a collection.
-     *
-     * @return \Illuminate\Support\Collection
-     */
-    public function collect()
-    {
-        return new Collection($this->all());
-    }
-
-    /**
-     * Get the collection of items as a plain array.
-     *
-     * @return array
-     */
-    public function toArray()
-    {
-        return $this->map(function ($value) {
-            return $value instanceof Arrayable ? $value->toArray() : $value;
-        })->all();
-    }
-
-    /**
-     * Convert the object into something JSON serializable.
-     *
-     * @return array
-     */
-    #[\ReturnTypeWillChange]
-    public function jsonSerialize()
-    {
-        return array_map(function ($value) {
-            if ($value instanceof JsonSerializable) {
-                return $value->jsonSerialize();
-            } elseif ($value instanceof Jsonable) {
-                return json_decode($value->toJson(), true);
-            } elseif ($value instanceof Arrayable) {
-                return $value->toArray();
-            }
-
-            return $value;
-        }, $this->all());
-    }
-
-    /**
-     * Get the collection of items as JSON.
-     *
-     * @param  int  $options
-     * @return string
-     */
-    public function toJson($options = 0)
-    {
-        return json_encode($this->jsonSerialize(), $options);
-    }
-
-    /**
-     * Get a CachingIterator instance.
-     *
-     * @param  int  $flags
-     * @return \CachingIterator
-     */
-    public function getCachingIterator($flags = CachingIterator::CALL_TOSTRING)
-    {
-        return new CachingIterator($this->getIterator(), $flags);
-    }
-
-    /**
-     * Convert the collection to its string representation.
-     *
-     * @return string
-     */
-    public function __toString()
-    {
-        return $this->escapeWhenCastingToString
-                    ? e($this->toJson())
-                    : $this->toJson();
-    }
-
-    /**
-     * Indicate that the model's string representation should be escaped when __toString is invoked.
-     *
-     * @param  bool  $escape
-     * @return $this
-     */
-    public function escapeWhenCastingToString($escape = true)
-    {
-        $this->escapeWhenCastingToString = $escape;
-
-        return $this;
-    }
-
-    /**
-     * Add a method to the list of proxied methods.
-     *
-     * @param  string  $method
-     * @return void
-     */
-    public static function proxy($method)
-    {
-        static::$proxies[] = $method;
-    }
-
-    /**
-     * Dynamically access collection proxies.
-     *
-     * @param  string  $key
-     * @return mixed
-     *
-     * @throws \Exception
-     */
-    public function __get($key)
-    {
-        if (! in_array($key, static::$proxies)) {
-            throw new Exception("Property [{$key}] does not exist on this collection instance.");
-        }
-
-        return new HigherOrderCollectionProxy($this, $key);
-    }
-
-    /**
-     * Results array of items from Collection or Arrayable.
-     *
-     * @param  mixed  $items
-     * @return array
-     */
-    protected function getArrayableItems($items)
-    {
-        if (is_array($items)) {
-            return $items;
-        } elseif ($items instanceof Enumerable) {
-            return $items->all();
-        } elseif ($items instanceof Arrayable) {
-            return $items->toArray();
-        } elseif ($items instanceof Jsonable) {
-            return json_decode($items->toJson(), true);
-        } elseif ($items instanceof JsonSerializable) {
-            return (array) $items->jsonSerialize();
-        } elseif ($items instanceof Traversable) {
-            return iterator_to_array($items);
-        } elseif ($items instanceof UnitEnum) {
-            return [$items];
-        }
-
-        return (array) $items;
-    }
-
-    /**
-     * Get an operator checker callback.
-     *
-     * @param  string  $key
-     * @param  string|null  $operator
-     * @param  mixed  $value
-     * @return \Closure
-     */
-    protected function operatorForWhere($key, $operator = null, $value = null)
-    {
-        if (func_num_args() === 1) {
-            $value = true;
-
-            $operator = '=';
-        }
-
-        if (func_num_args() === 2) {
-            $value = $operator;
-
-            $operator = '=';
-        }
-
-        return function ($item) use ($key, $operator, $value) {
-            $retrieved = data_get($item, $key);
-
-            $strings = array_filter([$retrieved, $value], function ($value) {
-                return is_string($value) || (is_object($value) && method_exists($value, '__toString'));
-            });
-
-            if (count($strings) < 2 && count(array_filter([$retrieved, $value], 'is_object')) == 1) {
-                return in_array($operator, ['!=', '<>', '!==']);
-            }
-
-            switch ($operator) {
-                default:
-                case '=':
-                case '==':  return $retrieved == $value;
-                case '!=':
-                case '<>':  return $retrieved != $value;
-                case '<':   return $retrieved < $value;
-                case '>':   return $retrieved > $value;
-                case '<=':  return $retrieved <= $value;
-                case '>=':  return $retrieved >= $value;
-                case '===': return $retrieved === $value;
-                case '!==': return $retrieved !== $value;
-            }
-        };
-    }
-
-    /**
-     * Determine if the given value is callable, but not a string.
-     *
-     * @param  mixed  $value
-     * @return bool
-     */
-    protected function useAsCallable($value)
-    {
-        return ! is_string($value) && is_callable($value);
-    }
-
-    /**
-     * Get a value retrieving callback.
-     *
-     * @param  callable|string|null  $value
-     * @return callable
-     */
-    protected function valueRetriever($value)
-    {
-        if ($this->useAsCallable($value)) {
-            return $value;
-        }
-
-        return function ($item) use ($value) {
-            return data_get($item, $value);
-        };
-    }
-
-    /**
-     * Make a function to check an item's equality.
-     *
-     * @param  mixed  $value
-     * @return \Closure
-     */
-    protected function equality($value)
-    {
-        return function ($item) use ($value) {
-            return $item === $value;
-        };
-    }
-
-    /**
-     * Make a function using another function, by negating its result.
-     *
-     * @param  \Closure  $callback
-     * @return \Closure
-     */
-    protected function negate(Closure $callback)
-    {
-        return function (...$params) use ($callback) {
-            return ! $callback(...$params);
-        };
-    }
-
-    /**
-     * Make a function that returns what's passed to it.
-     *
-     * @return \Closure
-     */
-    protected function identity()
-    {
-        return function ($value) {
-            return $value;
-        };
-    }
+	/**
+	 * Indicates that the object's string representation should be escaped when __toString is invoked.
+	 *
+	 * @var bool
+	 */
+	protected $escapeWhenCastingToString = false;
+
+	/**
+	 * The methods that can be proxied.
+	 *
+	 * @var string[]
+	 */
+	protected static $proxies = [
+		'average',
+		'avg',
+		'contains',
+		'doesntContain',
+		'each',
+		'every',
+		'filter',
+		'first',
+		'flatMap',
+		'groupBy',
+		'keyBy',
+		'map',
+		'max',
+		'min',
+		'partition',
+		'reject',
+		'skipUntil',
+		'skipWhile',
+		'some',
+		'sortBy',
+		'sortByDesc',
+		'sum',
+		'takeUntil',
+		'takeWhile',
+		'unique',
+		'until',
+	];
+
+	/**
+	 * Create a new collection instance if the value isn't one already.
+	 *
+	 * @param  mixed  $items
+	 * @return static
+	 */
+	public static function make($items = [])
+	{
+		return new static($items);
+	}
+
+	/**
+	 * Wrap the given value in a collection if applicable.
+	 *
+	 * @param  mixed  $value
+	 * @return static
+	 */
+	public static function wrap($value)
+	{
+		return $value instanceof Enumerable
+			? new static($value)
+			: new static(Arr::wrap($value));
+	}
+
+	/**
+	 * Get the underlying items from the given collection if applicable.
+	 *
+	 * @param  array|static  $value
+	 * @return array
+	 */
+	public static function unwrap($value)
+	{
+		return $value instanceof Enumerable ? $value->all() : $value;
+	}
+
+	/**
+	 * Create a new instance with no items.
+	 *
+	 * @return static
+	 */
+	public static function empty()
+	{
+		return new static([]);
+	}
+
+	/**
+	 * Create a new collection by invoking the callback a given amount of times.
+	 *
+	 * @param  int  $number
+	 * @param  callable|null  $callback
+	 * @return static
+	 */
+	public static function times($number, callable $callback = null)
+	{
+		if ($number < 1) {
+			return new static;
+		}
+
+		return static::range(1, $number)
+			->when($callback)
+			->map($callback);
+	}
+
+	/**
+	 * Alias for the "avg" method.
+	 *
+	 * @param  callable|string|null  $callback
+	 * @return mixed
+	 */
+	public function average($callback = null)
+	{
+		return $this->avg($callback);
+	}
+
+	/**
+	 * Alias for the "contains" method.
+	 *
+	 * @param  mixed  $key
+	 * @param  mixed  $operator
+	 * @param  mixed  $value
+	 * @return bool
+	 */
+	public function some($key, $operator = null, $value = null)
+	{
+		return $this->contains(...func_get_args());
+	}
+
+	/**
+	 * Determine if an item exists, using strict comparison.
+	 *
+	 * @param  mixed  $key
+	 * @param  mixed  $value
+	 * @return bool
+	 */
+	public function containsStrict($key, $value = null)
+	{
+		if (func_num_args() === 2) {
+			return $this->contains(function ($item) use ($key, $value) {
+				return data_get($item, $key) === $value;
+			});
+		}
+
+		if ($this->useAsCallable($key)) {
+			return ! is_null($this->first($key));
+		}
+
+		foreach ($this as $item) {
+			if ($item === $key) {
+				return true;
+			}
+		}
+
+		return false;
+	}
+
+	/**
+	 * Dump the items and end the script.
+	 *
+	 * @param  mixed  ...$args
+	 * @return void
+	 */
+	public function dd(...$args)
+	{
+		$this->dump(...$args);
+
+		exit(1);
+	}
+
+	/**
+	 * Dump the items.
+	 *
+	 * @return $this
+	 */
+	public function dump()
+	{
+		(new Collection(func_get_args()))
+			->push($this->all())
+			->each(function ($item) {
+				VarDumper::dump($item);
+			});
+
+		return $this;
+	}
+
+	/**
+	 * Execute a callback over each item.
+	 *
+	 * @param  callable  $callback
+	 * @return $this
+	 */
+	public function each(callable $callback)
+	{
+		foreach ($this as $key => $item) {
+			if ($callback($item, $key) === false) {
+				break;
+			}
+		}
+
+		return $this;
+	}
+
+	/**
+	 * Execute a callback over each nested chunk of items.
+	 *
+	 * @param  callable  $callback
+	 * @return static
+	 */
+	public function eachSpread(callable $callback)
+	{
+		return $this->each(function ($chunk, $key) use ($callback) {
+			$chunk[] = $key;
+
+			return $callback(...$chunk);
+		});
+	}
+
+	/**
+	 * Determine if all items pass the given truth test.
+	 *
+	 * @param  string|callable  $key
+	 * @param  mixed  $operator
+	 * @param  mixed  $value
+	 * @return bool
+	 */
+	public function every($key, $operator = null, $value = null)
+	{
+		if (func_num_args() === 1) {
+			$callback = $this->valueRetriever($key);
+
+			foreach ($this as $k => $v) {
+				if (! $callback($v, $k)) {
+					return false;
+				}
+			}
+
+			return true;
+		}
+
+		return $this->every($this->operatorForWhere(...func_get_args()));
+	}
+
+	/**
+	 * Get the first item by the given key value pair.
+	 *
+	 * @param  string  $key
+	 * @param  mixed  $operator
+	 * @param  mixed  $value
+	 * @return mixed
+	 */
+	public function firstWhere($key, $operator = null, $value = null)
+	{
+		return $this->first($this->operatorForWhere(...func_get_args()));
+	}
+
+	/**
+	 * Determine if the collection is not empty.
+	 *
+	 * @return bool
+	 */
+	public function isNotEmpty()
+	{
+		return ! $this->isEmpty();
+	}
+
+	/**
+	 * Run a map over each nested chunk of items.
+	 *
+	 * @param  callable  $callback
+	 * @return static
+	 */
+	public function mapSpread(callable $callback)
+	{
+		return $this->map(function ($chunk, $key) use ($callback) {
+			$chunk[] = $key;
+
+			return $callback(...$chunk);
+		});
+	}
+
+	/**
+	 * Run a grouping map over the items.
+	 *
+	 * The callback should return an associative array with a single key/value pair.
+	 *
+	 * @param  callable  $callback
+	 * @return static
+	 */
+	public function mapToGroups(callable $callback)
+	{
+		$groups = $this->mapToDictionary($callback);
+
+		return $groups->map([$this, 'make']);
+	}
+
+	/**
+	 * Map a collection and flatten the result by a single level.
+	 *
+	 * @param  callable  $callback
+	 * @return static
+	 */
+	public function flatMap(callable $callback)
+	{
+		return $this->map($callback)->collapse();
+	}
+
+	/**
+	 * Map the values into a new class.
+	 *
+	 * @param  string  $class
+	 * @return static
+	 */
+	public function mapInto($class)
+	{
+		return $this->map(function ($value, $key) use ($class) {
+			return new $class($value, $key);
+		});
+	}
+
+	/**
+	 * Get the min value of a given key.
+	 *
+	 * @param  callable|string|null  $callback
+	 * @return mixed
+	 */
+	public function min($callback = null)
+	{
+		$callback = $this->valueRetriever($callback);
+
+		return $this->map(function ($value) use ($callback) {
+			return $callback($value);
+		})->filter(function ($value) {
+			return ! is_null($value);
+		})->reduce(function ($result, $value) {
+			return is_null($result) || $value < $result ? $value : $result;
+		});
+	}
+
+	/**
+	 * Get the max value of a given key.
+	 *
+	 * @param  callable|string|null  $callback
+	 * @return mixed
+	 */
+	public function max($callback = null)
+	{
+		$callback = $this->valueRetriever($callback);
+
+		return $this->filter(function ($value) {
+			return ! is_null($value);
+		})->reduce(function ($result, $item) use ($callback) {
+			$value = $callback($item);
+
+			return is_null($result) || $value > $result ? $value : $result;
+		});
+	}
+
+	/**
+	 * "Paginate" the collection by slicing it into a smaller collection.
+	 *
+	 * @param  int  $page
+	 * @param  int  $perPage
+	 * @return static
+	 */
+	public function forPage($page, $perPage)
+	{
+		$offset = max(0, ($page - 1) * $perPage);
+
+		return $this->slice($offset, $perPage);
+	}
+
+	/**
+	 * Partition the collection into two arrays using the given callback or key.
+	 *
+	 * @param  callable|string  $key
+	 * @param  mixed  $operator
+	 * @param  mixed  $value
+	 * @return static
+	 */
+	public function partition($key, $operator = null, $value = null)
+	{
+		$passed = [];
+		$failed = [];
+
+		$callback = func_num_args() === 1
+				? $this->valueRetriever($key)
+				: $this->operatorForWhere(...func_get_args());
+
+		foreach ($this as $key => $item) {
+			if ($callback($item, $key)) {
+				$passed[$key] = $item;
+			} else {
+				$failed[$key] = $item;
+			}
+		}
+
+		return new static([new static($passed), new static($failed)]);
+	}
+
+	/**
+	 * Get the sum of the given values.
+	 *
+	 * @param  callable|string|null  $callback
+	 * @return mixed
+	 */
+	public function sum($callback = null)
+	{
+		$callback = is_null($callback)
+			? $this->identity()
+			: $this->valueRetriever($callback);
+
+		return $this->reduce(function ($result, $item) use ($callback) {
+			return $result + $callback($item);
+		}, 0);
+	}
+
+	/**
+	 * Apply the callback if the value is truthy.
+	 *
+	 * @param  bool|mixed  $value
+	 * @param  callable|null  $callback
+	 * @param  callable|null  $default
+	 * @return static|mixed
+	 */
+	public function when($value, callable $callback = null, callable $default = null)
+	{
+		if (! $callback) {
+			return new HigherOrderWhenProxy($this, $value);
+		}
+
+		if ($value) {
+			return $callback($this, $value);
+		} elseif ($default) {
+			return $default($this, $value);
+		}
+
+		return $this;
+	}
+
+	/**
+	 * Apply the callback if the collection is empty.
+	 *
+	 * @param  callable  $callback
+	 * @param  callable|null  $default
+	 * @return static|mixed
+	 */
+	public function whenEmpty(callable $callback, callable $default = null)
+	{
+		return $this->when($this->isEmpty(), $callback, $default);
+	}
+
+	/**
+	 * Apply the callback if the collection is not empty.
+	 *
+	 * @param  callable  $callback
+	 * @param  callable|null  $default
+	 * @return static|mixed
+	 */
+	public function whenNotEmpty(callable $callback, callable $default = null)
+	{
+		return $this->when($this->isNotEmpty(), $callback, $default);
+	}
+
+	/**
+	 * Apply the callback if the value is falsy.
+	 *
+	 * @param  bool  $value
+	 * @param  callable  $callback
+	 * @param  callable|null  $default
+	 * @return static|mixed
+	 */
+	public function unless($value, callable $callback, callable $default = null)
+	{
+		return $this->when(! $value, $callback, $default);
+	}
+
+	/**
+	 * Apply the callback unless the collection is empty.
+	 *
+	 * @param  callable  $callback
+	 * @param  callable|null  $default
+	 * @return static|mixed
+	 */
+	public function unlessEmpty(callable $callback, callable $default = null)
+	{
+		return $this->whenNotEmpty($callback, $default);
+	}
+
+	/**
+	 * Apply the callback unless the collection is not empty.
+	 *
+	 * @param  callable  $callback
+	 * @param  callable|null  $default
+	 * @return static|mixed
+	 */
+	public function unlessNotEmpty(callable $callback, callable $default = null)
+	{
+		return $this->whenEmpty($callback, $default);
+	}
+
+	/**
+	 * Filter items by the given key value pair.
+	 *
+	 * @param  string  $key
+	 * @param  mixed  $operator
+	 * @param  mixed  $value
+	 * @return static
+	 */
+	public function where($key, $operator = null, $value = null)
+	{
+		return $this->filter($this->operatorForWhere(...func_get_args()));
+	}
+
+	/**
+	 * Filter items where the value for the given key is null.
+	 *
+	 * @param  string|null  $key
+	 * @return static
+	 */
+	public function whereNull($key = null)
+	{
+		return $this->whereStrict($key, null);
+	}
+
+	/**
+	 * Filter items where the value for the given key is not null.
+	 *
+	 * @param  string|null  $key
+	 * @return static
+	 */
+	public function whereNotNull($key = null)
+	{
+		return $this->where($key, '!==', null);
+	}
+
+	/**
+	 * Filter items by the given key value pair using strict comparison.
+	 *
+	 * @param  string  $key
+	 * @param  mixed  $value
+	 * @return static
+	 */
+	public function whereStrict($key, $value)
+	{
+		return $this->where($key, '===', $value);
+	}
+
+	/**
+	 * Filter items by the given key value pair.
+	 *
+	 * @param  string  $key
+	 * @param  mixed  $values
+	 * @param  bool  $strict
+	 * @return static
+	 */
+	public function whereIn($key, $values, $strict = false)
+	{
+		$values = $this->getArrayableItems($values);
+
+		return $this->filter(function ($item) use ($key, $values, $strict) {
+			return in_array(data_get($item, $key), $values, $strict);
+		});
+	}
+
+	/**
+	 * Filter items by the given key value pair using strict comparison.
+	 *
+	 * @param  string  $key
+	 * @param  mixed  $values
+	 * @return static
+	 */
+	public function whereInStrict($key, $values)
+	{
+		return $this->whereIn($key, $values, true);
+	}
+
+	/**
+	 * Filter items such that the value of the given key is between the given values.
+	 *
+	 * @param  string  $key
+	 * @param  array  $values
+	 * @return static
+	 */
+	public function whereBetween($key, $values)
+	{
+		return $this->where($key, '>=', reset($values))->where($key, '<=', end($values));
+	}
+
+	/**
+	 * Filter items such that the value of the given key is not between the given values.
+	 *
+	 * @param  string  $key
+	 * @param  array  $values
+	 * @return static
+	 */
+	public function whereNotBetween($key, $values)
+	{
+		return $this->filter(function ($item) use ($key, $values) {
+			return data_get($item, $key) < reset($values) || data_get($item, $key) > end($values);
+		});
+	}
+
+	/**
+	 * Filter items by the given key value pair.
+	 *
+	 * @param  string  $key
+	 * @param  mixed  $values
+	 * @param  bool  $strict
+	 * @return static
+	 */
+	public function whereNotIn($key, $values, $strict = false)
+	{
+		$values = $this->getArrayableItems($values);
+
+		return $this->reject(function ($item) use ($key, $values, $strict) {
+			return in_array(data_get($item, $key), $values, $strict);
+		});
+	}
+
+	/**
+	 * Filter items by the given key value pair using strict comparison.
+	 *
+	 * @param  string  $key
+	 * @param  mixed  $values
+	 * @return static
+	 */
+	public function whereNotInStrict($key, $values)
+	{
+		return $this->whereNotIn($key, $values, true);
+	}
+
+	/**
+	 * Filter the items, removing any items that don't match the given type(s).
+	 *
+	 * @param  string|string[]  $type
+	 * @return static
+	 */
+	public function whereInstanceOf($type)
+	{
+		return $this->filter(function ($value) use ($type) {
+			if (is_array($type)) {
+				foreach ($type as $classType) {
+					if ($value instanceof $classType) {
+						return true;
+					}
+				}
+
+				return false;
+			}
+
+			return $value instanceof $type;
+		});
+	}
+
+	/**
+	 * Pass the collection to the given callback and return the result.
+	 *
+	 * @param  callable  $callback
+	 * @return mixed
+	 */
+	public function pipe(callable $callback)
+	{
+		return $callback($this);
+	}
+
+	/**
+	 * Pass the collection into a new class.
+	 *
+	 * @param  string  $class
+	 * @return mixed
+	 */
+	public function pipeInto($class)
+	{
+		return new $class($this);
+	}
+
+	/**
+	 * Pass the collection through a series of callable pipes and return the result.
+	 *
+	 * @param  array<callable>  $pipes
+	 * @return mixed
+	 */
+	public function pipeThrough($pipes)
+	{
+		return static::make($pipes)->reduce(
+			function ($carry, $pipe) {
+				return $pipe($carry);
+			},
+			$this
+		);
+	}
+
+	/**
+	 * Pass the collection to the given callback and then return it.
+	 *
+	 * @param  callable  $callback
+	 * @return $this
+	 */
+	public function tap(callable $callback)
+	{
+		$callback(clone $this);
+
+		return $this;
+	}
+
+	/**
+	 * Reduce the collection to a single value.
+	 *
+	 * @param  callable  $callback
+	 * @param  mixed  $initial
+	 * @return mixed
+	 */
+	public function reduce(callable $callback, $initial = null)
+	{
+		$result = $initial;
+
+		foreach ($this as $key => $value) {
+			$result = $callback($result, $value, $key);
+		}
+
+		return $result;
+	}
+
+	/**
+	 * Reduce the collection to multiple aggregate values.
+	 *
+	 * @param  callable  $callback
+	 * @param  mixed  ...$initial
+	 * @return array
+	 *
+	 * @deprecated Use "reduceSpread" instead
+	 *
+	 * @throws \UnexpectedValueException
+	 */
+	public function reduceMany(callable $callback, ...$initial)
+	{
+		return $this->reduceSpread($callback, ...$initial);
+	}
+
+	/**
+	 * Reduce the collection to multiple aggregate values.
+	 *
+	 * @param  callable  $callback
+	 * @param  mixed  ...$initial
+	 * @return array
+	 *
+	 * @throws \UnexpectedValueException
+	 */
+	public function reduceSpread(callable $callback, ...$initial)
+	{
+		$result = $initial;
+
+		foreach ($this as $key => $value) {
+			$result = call_user_func_array($callback, array_merge($result, [$value, $key]));
+
+			if (! is_array($result)) {
+				throw new UnexpectedValueException(sprintf(
+					"%s::reduceMany expects reducer to return an array, but got a '%s' instead.",
+					class_basename(static::class), gettype($result)
+				));
+			}
+		}
+
+		return $result;
+	}
+
+	/**
+	 * Reduce an associative collection to a single value.
+	 *
+	 * @param  callable  $callback
+	 * @param  mixed  $initial
+	 * @return mixed
+	 */
+	public function reduceWithKeys(callable $callback, $initial = null)
+	{
+		return $this->reduce($callback, $initial);
+	}
+
+	/**
+	 * Create a collection of all elements that do not pass a given truth test.
+	 *
+	 * @param  callable|mixed  $callback
+	 * @return static
+	 */
+	public function reject($callback = true)
+	{
+		$useAsCallable = $this->useAsCallable($callback);
+
+		return $this->filter(function ($value, $key) use ($callback, $useAsCallable) {
+			return $useAsCallable
+				? ! $callback($value, $key)
+				: $value != $callback;
+		});
+	}
+
+	/**
+	 * Return only unique items from the collection array using strict comparison.
+	 *
+	 * @param  string|callable|null  $key
+	 * @return static
+	 */
+	public function uniqueStrict($key = null)
+	{
+		return $this->unique($key, true);
+	}
+
+	/**
+	 * Collect the values into a collection.
+	 *
+	 * @return \Illuminate\Support\Collection
+	 */
+	public function collect()
+	{
+		return new Collection($this->all());
+	}
+
+	/**
+	 * Get the collection of items as a plain array.
+	 *
+	 * @return array
+	 */
+	public function toArray()
+	{
+		return $this->map(function ($value) {
+			return $value instanceof Arrayable ? $value->toArray() : $value;
+		})->all();
+	}
+
+	/**
+	 * Convert the object into something JSON serializable.
+	 *
+	 * @return array
+	 */
+	#[\ReturnTypeWillChange]
+	public function jsonSerialize()
+	{
+		return array_map(function ($value) {
+			if ($value instanceof JsonSerializable) {
+				return $value->jsonSerialize();
+			} elseif ($value instanceof Jsonable) {
+				return json_decode($value->toJson(), true);
+			} elseif ($value instanceof Arrayable) {
+				return $value->toArray();
+			}
+
+			return $value;
+		}, $this->all());
+	}
+
+	/**
+	 * Get the collection of items as JSON.
+	 *
+	 * @param  int  $options
+	 * @return string
+	 */
+	public function toJson($options = 0)
+	{
+		return json_encode($this->jsonSerialize(), $options);
+	}
+
+	/**
+	 * Get a CachingIterator instance.
+	 *
+	 * @param  int  $flags
+	 * @return \CachingIterator
+	 */
+	public function getCachingIterator($flags = CachingIterator::CALL_TOSTRING)
+	{
+		return new CachingIterator($this->getIterator(), $flags);
+	}
+
+	/**
+	 * Convert the collection to its string representation.
+	 *
+	 * @return string
+	 */
+	public function __toString()
+	{
+		return $this->escapeWhenCastingToString
+					? e($this->toJson())
+					: $this->toJson();
+	}
+
+	/**
+	 * Indicate that the model's string representation should be escaped when __toString is invoked.
+	 *
+	 * @param  bool  $escape
+	 * @return $this
+	 */
+	public function escapeWhenCastingToString($escape = true)
+	{
+		$this->escapeWhenCastingToString = $escape;
+
+		return $this;
+	}
+
+	/**
+	 * Add a method to the list of proxied methods.
+	 *
+	 * @param  string  $method
+	 * @return void
+	 */
+	public static function proxy($method)
+	{
+		static::$proxies[] = $method;
+	}
+
+	/**
+	 * Dynamically access collection proxies.
+	 *
+	 * @param  string  $key
+	 * @return mixed
+	 *
+	 * @throws \Exception
+	 */
+	public function __get($key)
+	{
+		if (! in_array($key, static::$proxies)) {
+			throw new Exception("Property [{$key}] does not exist on this collection instance.");
+		}
+
+		return new HigherOrderCollectionProxy($this, $key);
+	}
+
+	/**
+	 * Results array of items from Collection or Arrayable.
+	 *
+	 * @param  mixed  $items
+	 * @return array
+	 */
+	protected function getArrayableItems($items)
+	{
+		if (is_array($items)) {
+			return $items;
+		} elseif ($items instanceof Enumerable) {
+			return $items->all();
+		} elseif ($items instanceof Arrayable) {
+			return $items->toArray();
+		} elseif ($items instanceof Jsonable) {
+			return json_decode($items->toJson(), true);
+		} elseif ($items instanceof JsonSerializable) {
+			return (array) $items->jsonSerialize();
+		} elseif ($items instanceof Traversable) {
+			return iterator_to_array($items);
+		} elseif ($items instanceof UnitEnum) {
+			return [$items];
+		}
+
+		return (array) $items;
+	}
+
+	/**
+	 * Get an operator checker callback.
+	 *
+	 * @param  string  $key
+	 * @param  string|null  $operator
+	 * @param  mixed  $value
+	 * @return \Closure
+	 */
+	protected function operatorForWhere($key, $operator = null, $value = null)
+	{
+		if (func_num_args() === 1) {
+			$value = true;
+
+			$operator = '=';
+		}
+
+		if (func_num_args() === 2) {
+			$value = $operator;
+
+			$operator = '=';
+		}
+
+		return function ($item) use ($key, $operator, $value) {
+			$retrieved = data_get($item, $key);
+
+			$strings = array_filter([$retrieved, $value], function ($value) {
+				return is_string($value) || (is_object($value) && method_exists($value, '__toString'));
+			});
+
+			if (count($strings) < 2 && count(array_filter([$retrieved, $value], 'is_object')) == 1) {
+				return in_array($operator, ['!=', '<>', '!==']);
+			}
+
+			switch ($operator) {
+				default:
+				case '=':
+				case '==':  return $retrieved == $value;
+				case '!=':
+				case '<>':  return $retrieved != $value;
+				case '<':   return $retrieved < $value;
+				case '>':   return $retrieved > $value;
+				case '<=':  return $retrieved <= $value;
+				case '>=':  return $retrieved >= $value;
+				case '===': return $retrieved === $value;
+				case '!==': return $retrieved !== $value;
+			}
+		};
+	}
+
+	/**
+	 * Determine if the given value is callable, but not a string.
+	 *
+	 * @param  mixed  $value
+	 * @return bool
+	 */
+	protected function useAsCallable($value)
+	{
+		return ! is_string($value) && is_callable($value);
+	}
+
+	/**
+	 * Get a value retrieving callback.
+	 *
+	 * @param  callable|string|null  $value
+	 * @return callable
+	 */
+	protected function valueRetriever($value)
+	{
+		if ($this->useAsCallable($value)) {
+			return $value;
+		}
+
+		return function ($item) use ($value) {
+			return data_get($item, $value);
+		};
+	}
+
+	/**
+	 * Make a function to check an item's equality.
+	 *
+	 * @param  mixed  $value
+	 * @return \Closure
+	 */
+	protected function equality($value)
+	{
+		return function ($item) use ($value) {
+			return $item === $value;
+		};
+	}
+
+	/**
+	 * Make a function using another function, by negating its result.
+	 *
+	 * @param  \Closure  $callback
+	 * @return \Closure
+	 */
+	protected function negate(Closure $callback)
+	{
+		return function (...$params) use ($callback) {
+			return ! $callback(...$params);
+		};
+	}
+
+	/**
+	 * Make a function that returns what's passed to it.
+	 *
+	 * @return \Closure
+	 */
+	protected function identity()
+	{
+		return function ($value) {
+			return $value;
+		};
+	}
 }