code: def split_join_classification(element, classification_labels, nodes_classification):
          
          classification_join = "Join"
          classification_split = "Split"
          if len(element[1][consts.Consts.incoming_flow]) >= 2:
              classification_labels.append(classification_join)
          if len(element[1][consts.Consts.outgoing_flow]) >= 2:
              classification_labels.append(classification_split)
          nodes_classification[element[0]] = classification_labels
docs: Add the "Split", "Join" classification, if the element qualifies for.
  
          :param element: an element from BPMN diagram,
          :param classification_labels: list of labels attached to the element,
          :param nodes_classification: dictionary of classification labels. Key - node id. Value - a list of labels.