static v8::Handle<v8::Value> dispatchEventCallback(const v8::Arguments& args)
{
    if (args.Length() < 1)
        return throwNotEnoughArgumentsError(args.GetIsolate());
    MediaSource* imp = V8MediaSource::toNative(args.Holder());
    ExceptionCode ec = 0;
    {
    V8TRYCATCH(Event*, event, V8Event::HasInstance(MAYBE_MISSING_PARAMETER(args, 0, DefaultIsUndefined)) ? V8Event::toNative(v8::Handle<v8::Object>::Cast(MAYBE_MISSING_PARAMETER(args, 0, DefaultIsUndefined))) : 0);
    bool result = imp->dispatchEvent(event, ec);
    if (UNLIKELY(ec))
        goto fail;
    return v8Boolean(result, args.GetIsolate());
    }
    fail:
    return setDOMException(ec, args.GetIsolate());
}