src/Collection.php
public function reverse()
    {
        $positions = array_flip($this->getKeys());
        $this->uksort(
            function ($a, $b) use ($positions) {
                return ($positions[$a] < $positions[$b] ? 1 : -1);
            }
        );

        return $this;
    }
public function reverse()
    {
        $positions = array_flip($this->getKeys());
        $this->uksort(
            function ($a, $b) use ($positions) {
                return ($positions[$a] < $positions[$b] ? 1 : -1);
            }
        );

        return $this;
    }
Return an collection with elements in reverse order

@return static