operator()

PluginNode& PluginNode::operator()(PluginNode& preNode);

template<typename... Args>
PluginNode& PluginNode::operator()(PluginNode& preNode, Args&... args)
{
    operator()(preNode);
    operator()(args...);
    return *this;
}

PluginNode& PluginNode::operator()(std::vector<PluginNode>& preNodeList);