public function addRole($role)
{
!$role instanceof Role && ($role = new Role($role));
$role->addUser($this, false);
$this->roles->add($role);
return $this;
}
public function setParent(Role $parent, $addChildToParent = true)
{
$addChildToParent && $parent->addChildren($this, false);
$this->parent = $parent;
}