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bmf::builder::Node::AddCallback设置回调之后RealNode::NodeMetaInfo::Dump的时候抛出异常cannot use operator[] with a numeric argument with

![NodeMetaInfo-Dump](https://github.com/BabitMF/bmf/assets/34549878/1fc1e6f4-5ebf-4ba5-90b7-574934851175) ![NodeMetaInfo-tojson](https://github.com/BabitMF/bmf/assets/34549878/bfac6ea6-e710-43d7-a1e8-f6954fc70d1b)

bmf::builder::Node::AddCallback设置回调之后RealNode::NodeMetaInfo::Dump的时候抛出异常cannot use operator[] with a numeric argument with

dump_graph:1构造graph->创建解码器->创建编码器->任意一个node AddCallback->run 代码如下： nlohmann::json graph_para = {{"dump_graph", 1}}; auto graph = bmf::builder::Graph(bmf::builder::NormalMode, bmf_sdk::JsonParam(graph_para)); nlohmann::json decode_para = { {"input_path", "../../files/big_bunny_10s_30fps.mp4"}}; auto video = graph.Decode(bmf_sdk::JsonParam(decode_para)); nlohmann::json encode_para = {{"output_path", output_file}, {"video_params", {{"codec",...