rb_is_instance_id 15037 ext/ripper/ripper.c rb_is_instance_id(ID id)
rb_is_instance_id 9637 ext/ripper/ripper.y rb_is_instance_id(ID id)
rb_is_instance_id 14969 parse.c        rb_is_instance_id(ID id)
rb_is_instance_id 9637 parse.y        rb_is_instance_id(ID id)