framework/rbac/BaseManager.php
public function add($object)
    {
        if ($object instanceof Item) {
            if ($object->ruleName && $this->getRule($object->ruleName) === null) {
                $rule = \Yii::createObject($object->ruleName);
                $rule->name = $object->ruleName;
                $this->addRule($rule);
            }

            return $this->addItem($object);
        } elseif ($object instanceof Rule) {
            return $this->addRule($object);
        }

        throw new InvalidArgumentException('Adding unsupported object type.');
    }
public function add($object)
    {
        if ($object instanceof Item) {
            if ($object->ruleName && $this->getRule($object->ruleName) === null) {
                $rule = \Yii::createObject($object->ruleName);
                $rule->name = $object->ruleName;
                $this->addRule($rule);
            }

            return $this->addItem($object);
        } elseif ($object instanceof Rule) {
            return $this->addRule($object);
        }

        throw new InvalidArgumentException('Adding unsupported object type.');
    }
{@inheritdoc}