.. master:: int valid_query_snoop(object ob)

  Should return 1 if ``previous_object()`` (the one that called :efun:`query_snoop` is allowed to query whether ob is being snooped, 0 if not.

  The master object is always allowed to use :efun:`query_snoop`.

  .. seealso:: :master:`valid_snoop`, :efun:`query_snoop`, :efun:`snoop`