rb_gc_start      2883 gc.c               rb_define_singleton_method(rb_mGC, "start", rb_gc_start, 0);
rb_gc_start      2889 gc.c               rb_define_method(rb_mGC, "garbage_collect", rb_gc_start, 0);
rb_gc_start      2901 gc.c               rb_define_module_function(rb_mObSpace, "garbage_collect", rb_gc_start, 0);
rb_gc_start       370 include/ruby/intern.h VALUE rb_gc_start(void);