Symfony\Component\Config\Definition\PrototypedArrayNode::setAddChildrenIfNoneSet PHP Method

    public function setAddChildrenIfNoneSet($children = array('defaults'))
    {
        if (null === $children) {
            $this->defaultChildren = array('defaults');
        } else {
            $this->defaultChildren = is_int($children) && $children > 0 ? range(1, $children) : (array) $children;
        }
    }