id_attached       427 class.c        	rb_class_ivar_set(klass, id_attached, obj);
id_attached       446 class.c            return rb_attr_get(METACLASS_OF(sklass), id_attached) == sklass;
id_attached       452 class.c            return (RB_TYPE_P(rb_attr_get(sklass, id_attached), T_CLASS) &&
id_attached      1593 class.c        	  rb_ivar_get(klass, id_attached) == obj)) {
id_attached      1638 class.c            if (rb_ivar_get(klass, id_attached) != obj) return Qnil;