docs: def all_multi_paths(graph, source, target, data=False):
      r"""
      Returns specific paths along multi-edges from the source to this table.
      Multipaths are identified by edge keys.
  
      Returns all paths from source to target. This function treats multi-edges
      as distinct and returns the key value in each edge tuple that defines a
      path.
  
      Example:
          >>> # DISABLE_DOCTEST
          >>> from dtool.depcache_control import *  # NOQA
          >>> from utool.util_graph import *  # NOQA
          >>> from dtool.example_depcache import testdata_depc
          >>> depc = testdata_depc()
          >>> graph = depc.graph
          >>> source = depc.root
          >>> target = 'notchpair'
          >>> path_list1 = ut.all_multi_paths(graph, depc.root, 'notchpair')
          >>> path_list2 = ut.all_multi_paths(graph, depc.root, 'spam')
          >>> result1 = ('path_list1 = %s' % ut.repr3(path_list1, nl=1))
          >>> result2 = ('path_list2 = %s' % ut.repr3(path_list2, nl=2))
          >>> result = '\n'.join([result1, result2])
          >>> print(result)
          path_list1 = [
              [('dummy_annot', 'notch', 0), ('notch', 'notchpair', 0)],
              [('dummy_annot', 'notch', 0), ('notch', 'notchpair', 1)],
          ]
          path_list2 = [
              [
                  ('dummy_annot', 'chip', 0),
                  ('chip', 'keypoint', 0),
                  ('keypoint', 'fgweight', 0),
                  ('fgweight', 'spam', 0),
              ],
              [
                  ('dummy_annot', 'chip', 0),
                  ('chip', 'keypoint', 0),
                  ('keypoint', 'spam', 0),
              ],
              [
                  ('dummy_annot', 'chip', 0),
                  ('chip', 'spam', 0),
              ],
              [
                  ('dummy_annot', 'probchip', 0),
                  ('probchip', 'fgweight', 0),
                  ('fgweight', 'spam', 0),
              ],
          ]
      """
      path_multiedges = list(nx_all_simple_edge_paths(graph, source, target,
                                                      keys=True, data=data))
      return path_multiedges