rb_dlcfunc_inspect  513 ext/dl/cfunc.c     rb_define_method(rb_cDLCFunc, "inspect", rb_dlcfunc_inspect, 0);
rb_dlcfunc_inspect  514 ext/dl/cfunc.c     rb_define_method(rb_cDLCFunc, "to_s", rb_dlcfunc_inspect, 0);