rb_obj_dig       5655 array.c            return rb_obj_dig(argc, argv, self, Qnil);
rb_obj_dig       2745 hash.c             return rb_obj_dig(argc, argv, self, Qnil);
rb_obj_dig       1194 internal.h     VALUE rb_obj_dig(int argc, VALUE *argv, VALUE self, VALUE notfound);
rb_obj_dig       1154 struct.c           return rb_obj_dig(argc, argv, self, Qnil);