code: def set_incoming(self, value):
          
          if not isinstance(value, list):
              raise TypeError("IncomingList new value must be a list")
          for element in value:
              if not isinstance(element, str):
                  raise TypeError("IncomingList elements in variable must be of String class")
          self.__incoming_list = value
docs: Setter for 'incoming' field.
          :param value - a new value of 'incoming' field. List of IDs (String type) of incoming flows.