Gittern\Iterator\RecursiveTreeIterator::getChildren PHP Метод

    public function getChildren()
    {
        if ($this->hasChildren()) {
            $iter = $this->current()->getTree()->getIterator();
            if ($iter instanceof RecursiveTreeIterator) {
                $iter->setKeyBase($this->key());
            }
            return $iter;
        }
        return null;
    }

 public function testCantGetCurrentChildrenWhenTheyDontExist()
 {
     $iterator = new RecursiveTreeIterator(array('foo' => 'bar'));
     $this->assertNull($iterator->getChildren());
 }