docs: def _clone_reverses(self, old_reverses):
          """
          Clones all the objects that were previously gathered.
          """
  
          for ctype, reverses in old_reverses.items():
              for parts in reverses.values():
                  sub_objs = parts[1]
                  field_name = parts[0]
  
                  attrs = {}
                  for sub_obj in sub_objs:
                      if ctype != 'm2m' and not attrs:
                          field = sub_obj._meta.get_field(field_name)
                          attrs = {
                              field.column: getattr(self, field.rel.field_name)
                          }
                      sub_obj._clone(**attrs)
  
                  if ctype == 'm2m':
                      setattr(self, field_name, sub_objs)