potion_table_at   866 core/potion.h  PN potion_table_at(Potion *, PN, PN, PN);
potion_table_at   681 core/table.c     potion_type_call_is(tbl_vt, PN_FUNC(potion_table_at, "key=o"));
potion_table_at   683 core/table.c     potion_method(tbl_vt, "at", potion_table_at, "key=o");