.. applied:: int query_weight(void)
  :deprecated:

  In compat mode this lfun is used by :efun:`transfer`. Note that no ``set_weight()`` is required by the parser.

  .. todo:: set_weight doesn't exist; is the reference obsolete?

  :history 3.3 deprecated: because :efun:`transfer` has been deprecated.

  .. seealso:: :efun:`transfer`, :applied:`add_weight`