How to work with pb_utils.InferenceRequest and pb_utils.InferenceResponse on the Python backend?

[TopCoder2K]

I've read many pages here: https://docs.nvidia.com/deeplearning/triton-inference-server/user-guide/docs/introduction/index.html, but it seems there is no complete information about it. Some tutorials only show specific examples but I cannot find any field or method descriptions (which are needed to carefully use the classes in my case).