/**
  * Get all members.
  * @return BaseUserQuery
  */
 public function getMembers($type = 'all')
 {
     $model = User::buildNoInitModel();
     $query = $this->hasMany(User::className(), [$model->guidAttribute => 'member_guid'])->via('memberItems');
     $type = (array) $type;
     foreach ($type as $key => $t) {
         if (array_key_exists($t, static::$types)) {
             unset($type[$key]);
         }
         $query = $query->andWhere(['type' => $type]);
     }
     return $query;
     /* SELECT * FROM `rho_user` WHERE <Organization::$member_guid> IN (...) */
 }
 /**
  * 
  * @param User $following
  * @return BaseUserQuery
  */
 public function isFollowing($following)
 {
     $model = User::buildNoInitModel();
     return $this->getFollowings()->andWhere([$model->guidAttribute => $following->guid])->exists();
 }