code: function processError (error) {
      if (_cb.beforeReturnError) { _cb.beforeReturnError(error); }
      if (_cb.returnError) { _cb.returnError(error, response); }
      if (_cb.afterReturnError) { _cb.afterReturnError(error); }
    }
docs: Call provided callback for error case.
  
  @param error - The database receive error