FOF30\Utils\Collection::collapse PHP Метод

    public function collapse()
    {
        $results = array();
        foreach ($this->items as $values) {
            $results = array_merge($results, $values);
        }
        return new static($results);
    }

 public function testCollapse()
 {
     $data = new Collection(array(array($object1 = new \StdClass()), array($object2 = new \StdClass())));
     $this->assertEquals(array($object1, $object2), $data->collapse()->all());
 }