ip_set_variable2 9541 ext/tk/tcltklib.c     return ip_set_variable2(self, varname, Qnil, value, flag);
ip_set_variable2 9654 ext/tk/tcltklib.c     return ip_set_variable2(self, varname, index, value,
ip_set_variable2 10981 ext/tk/tcltklib.c     rb_define_method(ip, "_set_variable2", ip_set_variable2, 4);