spatie / laravel-collection-macros

src/macros/none.php

<?php

use Illuminate\Support\Collection;

/*
 * Check whether a collection doesn't contain any occurrences of a given
 * item, key-value pair, or passing truth test. `none` accepts the same
 * parameters as the `contains` collection method.
 *
 * @see \Illuminate\Support\Collection::contains
 *
 * @param mixed $key
 * @param mixed $value
 *
 * @return bool
 */
Collection::macro('none', function ($key, $value = null): bool {
    if (func_num_args() === 2) {
        return ! $this->contains($key, $value);

The variable $this does not exist. Did you forget to declare it?

    }

    return ! $this->contains($key);
});