Collections\Collection::reverse PHP Method

    public function reverse()
    {
        $items = array_reverse($this->items);
        $col = new static($this->type);
        $col->setItemsFromTrustedSource($items);
        return $col;
    }

 public function testReverse()
 {
     $c = new Collection('int', [1, 2, 3]);
     $r = $c->reverse();
     $this->assertEquals([3, 2, 1], $r->toArray());
     $this->assertEquals([1, 2, 3], $c->toArray());
 }