Nette\Security\User::isInRole PHP Method

    public function isInRole($role)
    {
        return in_array($role, $this->getRoles(), TRUE);
    }

 /**
  * Is user allowed to perform given action with given resource.
  *
  * @param mixed
  * @param string for example 'view', 'edit'
  * @return bool
  * @throws \NetteAddons\InvalidArgumentException
  */
 public function isAllowed($resource, $action)
 {
     $moderator = $this->user->isInRole('administrators') || $this->user->isInRole('moderators');
     if ($resource instanceof Addon) {
         $ownerId = $resource->userId;
         $resource = 'addon';
     } elseif ($resource instanceof \Nette\Database\Table\ActiveRow) {
         $ownerId = $resource->user->id;
         $resource = 'addon';
     } elseif ($resource == 'page' && $action == 'manage') {
         return $moderator;
     } elseif ($resource != 'addon') {
         throw new \NetteAddons\InvalidArgumentException();
     }
     if ($resource === 'addon') {
         if ($action === 'delete' || $action === 'reports') {
             return $moderator;
         }
         if ($action === 'view') {
             return TRUE;
         } elseif ($action === 'manage') {
             return $this->user->isLoggedIn() && $ownerId === $this->user->getId() || $moderator;
         } elseif ($action === 'vote') {
             // you can't vote for your own addons
             return $this->user->isLoggedIn() && $ownerId !== $this->user->getId();
         } elseif ($action === 'create') {
             return $this->user->isLoggedIn();
         }
     }
     throw new \NetteAddons\InvalidArgumentException();
 }