yii\rbac\ManagerInterface::update PHP Method

    public function update($name, $object);

 /**
  * @return bool
  */
 public function updatePermission()
 {
     if ($this->validate()) {
         $permission = $this->authManager->getPermission($this->name);
         $permission->description = $this->description;
         return $this->authManager->update($this->name, $permission);
     }
     return false;
 }