docs: def _init_map(self):
          """Have to call these all separately because they are "end" classes,
          with no super() in them. Non-cooperative."""
          ItemTextsFormRecord._init_map(self)
          ItemFilesFormRecord._init_map(self)
          edXBaseFormRecord._init_map(self)
          IRTItemFormRecord._init_map(self)
          TimeValueFormRecord._init_map(self)
          ProvenanceFormRecord._init_map(self)
          super(edXItemFormRecord, self)._init_map()