docs: def get_data_flow_m(self, data_flow_id):
          """Searches and return the data flow model with the given in the given container state model
  
          :param data_flow_id: The data flow id to be searched
          :return: The model of the data flow or None if it is not found
          """
          for data_flow_m in self.data_flows:
              if data_flow_m.data_flow.data_flow_id == data_flow_id:
                  return data_flow_m
          return None