text: """
  Errors used in the module.
  
  Copyright (C) CERN 2013-2021
  """
  
  
  class MessageError(Exception):
      """
      Raised when errors occurs during Message handling.
      """
      pass
  
  
  class GeneratorError(Exception):
      """
      Raised when errors occurs during Generator handling.
      """
      pass
  