Method walk

src/builtin/module_builtin_fio.cpp:50–61

    struct TimeAnnotation : ManagedValueAnnotation<Time> {
        TimeAnnotation(ModuleLibrary & mlib) : ManagedValueAnnotation<Time>(mlib, "clock","das::Time") {}
        virtual void walk ( DataWalker & walker, void * data ) override {
            if ( walker.reading ) {
                // there shuld be a way to read time from the stream here
            } else {
                Time * t = (Time *) data;
                char mbstr[100];
                if ( strftime(mbstr, sizeof(mbstr), "%c", localtime(&t->time)) ) {
                    char * str = mbstr;
                    walker.String(str);
                }
            }
        }
    };

    Time builtin_clock() {