lib_num_of_mainwindows_core 2005 ext/tk/tcltklib.c     return tk_funcall(lib_num_of_mainwindows_core, 0, (VALUE*)NULL, self);
lib_num_of_mainwindows_core 2007 ext/tk/tcltklib.c     return lib_num_of_mainwindows_core(self, 0, (VALUE*)NULL);