docs: def remove_data_flows_with_data_port_id(self, data_port_id):
          """Remove all data flows whose from_key or to_key equals the passed data_port_id
  
          :param data_port_id: the id of a data_port of which all data_flows should be removed, the id can be a input or
                              output data port id
  
          """
          if not self.is_root_state:
              # delete all data flows in parent related to data_port_id and self.state_id
              data_flow_ids_to_remove = []
              for data_flow_id, data_flow in self.parent.data_flows.items():
                  if data_flow.from_state == self.state_id and data_flow.from_key == data_port_id or \
                          data_flow.to_state == self.state_id and data_flow.to_key == data_port_id:
                      data_flow_ids_to_remove.append(data_flow_id)
  
              for data_flow_id in data_flow_ids_to_remove:
                  self.parent.remove_data_flow(data_flow_id)