rb_is_instance_id  467 include/ruby/intern.h int rb_is_instance_id(ID);
rb_is_instance_id  323 object.c           if (!rb_is_instance_id(id)) return ST_CONTINUE;
rb_is_instance_id 1818 object.c           if (!rb_is_instance_id(id)) {
rb_is_instance_id 1849 object.c           if (!rb_is_instance_id(id)) {
rb_is_instance_id 1878 object.c           if (!rb_is_instance_id(id)) {
rb_is_instance_id 1170 variable.c         if (rb_is_instance_id(key)) {
rb_is_instance_id 1237 variable.c         if (!rb_is_instance_id(id)) {