static void loopStartAttrSetter(v8::Local<v8::String> name, v8::Local<v8::Value> value, const v8::AccessorInfo& info)
{
    AudioBufferSourceNode* imp = V8AudioBufferSourceNode::toNative(info.Holder());
    double v = static_cast<double>(value->NumberValue());
    imp->setLoopStart(v);
    return;
}