code: def get_flows_list_by_process_id(self, process_id):
          
          tmp_flows = self.diagram_graph.edges(data=True)
          flows = []
          for flow in tmp_flows:
              if consts.Consts.process in flow[2] and flow[2][consts.Consts.process] == process_id:
                  flows.append(flow)
          return flows
docs: Gets an edge (flow) with requested ID.
          Returns a tuple, where first value is node ID, second - a dictionary of all node attributes.
  
          :param process_id: string object, representing an ID of parent process element.