static void APEHookMessageEx(Class class, SEL selector, IMP replacement, IMP *result) {
    if(class == nil) {
        printf("APEInject:Warning: nil class argument\n");
        return;
    } else if (selector == nil) {
        printf("APEInject:Warning: nil sel argument\n");
        return;
    } else if (replacement == nil) {
        printf("APEInject:Warning: nil imp argument\n");
        return;
    }
    const char *name = sel_getName(selector);
    Method method = class_getInstanceMethod(class, selector);
    if(method == nil) {
        printf("APEInject:Warning: message not found [%s %s]\n", class_getName(class), name);
        return;
    }
    const char *type = method_getTypeEncoding(method);
    IMP old = method_getImplementation(method);
    if (result != NULL)
        *result = old;
    if(!class_addMethod(class, selector, replacement, type))
        method_setImplementation(method, replacement);

}