Thanks @herin049. My suggestion is to simulate a Collector receiving JSON. In other words, end-to-end tests that create SDK objects typically sent to an exporter for emission (traces, metrics, and logs), serialize those objects into JSON using the functionality in this PR, send that JSON to our simulated Collector (google.protobuf.json_format.Parse), and make sure that the "Collector" produces data that matches what was fed into the other end of the pipe.