public function byParent($id, $databaseConnectionName = null)
  {
    if(empty($databaseConnectionName))
    {
      $databaseConnectionName = $this->databaseConnectionName;
    }

    return $this->Account->setConnection($databaseConnectionName)
      ->where('parent_account_id', '=', $id)
      ->orderBy('key', 'asc')
      ->get();
  }