.. master:: int query_allow_shadow(object victim)

  Return 1 if ``previous_object()`` is allowed to use :efun:`shadow` on object :arg:`victim`, 0 if it is not.

  The function should deny shadowing on all root objects, else it might query the victim for clearance. Most installations seem to use ``victim->prevent_shadow(previous_object())`` to check if the victim denies being shadowed.

  .. seealso:: :efun:`shadow`