pinepain / php-object-maps

        return $new;

    }

    public function put($key, $value)

    {

        if ($this->keys->has($key)) {

            throw new OverflowException('Value with such key already exists');

        }

        if ($this->values->has($value)) {

            throw new OverflowException('Key with such value already exists');

        }

        $this->keys->put($key, $value);

        $this->values->put($value, $key);

    }

    public function get($key)

    {

        return $this->keys->has($key);

    }

    public function remove($key)

    {

        if ($this->keys->has($key)) {

            throw new OutOfBoundsException('Value with such key not found');

        }

        $value = $this->keys->remove($key);

        if ($this->values->has($value)) {

            // UNEXPECTED

            throw new OutOfBoundsException('Key with such value not found');

        }

        $this->values->remove($value);

        return $value;

    }

    public function clear()

    {