[PGLBox] set_node_iter_from_graph method of GraphGpuWrapper. Where does it come from?

[EugeneNasonov]

The GraphGpuWrapper from the graph.py class has a set_node_iter_from_graph method. However, it is not present in Paddle implementation, I've looked through all the branches. Is it some addition that authors made? Also, describe what it does please.

GraphGpuWrapper binding:
https://github.com/PaddlePaddle/Paddle/blob/develop/paddle/fluid/pybind/fleet_py.cc#L361
Its corresponding header:
https://github.com/PaddlePaddle/Paddle/blob/develop/paddle/fluid/framework/fleet/heter_ps/graph_gpu_wrapper.h
Method that is not present in that class and that I cannot understand:
https://github.com/PaddlePaddle/PGL/blob/main/apps/PGLBox/src/graph.py#L298