IN_SET            654 Zend/zend_object_handlers.c 	    if (!((*guard) & IN_SET)) {
IN_SET            658 Zend/zend_object_handlers.c 			(*guard) |= IN_SET; /* prevent circular setting */
IN_SET            662 Zend/zend_object_handlers.c 			(*guard) &= ~IN_SET;