tk_symbolkey2str 1867 ext/tk/tkutil/tkutil.c     rb_define_singleton_method(mTK, "_symbolkey2str", tk_symbolkey2str, 1);
tk_symbolkey2str 1883 ext/tk/tkutil/tkutil.c     rb_define_method(mTK, "_symbolkey2str", tk_symbolkey2str, 1);