gc_start_internal 9459 gc.c               rb_define_singleton_method(rb_mGC, "start", gc_start_internal, -1);
gc_start_internal 9467 gc.c               rb_define_method(rb_mGC, "garbage_collect", gc_start_internal, -1);
gc_start_internal 9489 gc.c               rb_define_module_function(rb_mObjSpace, "garbage_collect", gc_start_internal, -1);