## Expected Behavior Able to use [proto_data](https://github.com/cloudevents/spec/blob/main/cloudevents/formats/cloudevents.proto#L40), [somehow](https://github.com/cloudevents/spec/blob/main/cloudevents/formats/protobuf-format.md#62-proto-message-as-event-data). ## Actual Behavior No code in repo even refers to proto or any way to use it because v1.0 did not have that. ## Steps to Reproduce the Problem 1. Make a proto for your data 2. Try to assign it to data 3. Fail / `Object of type X is not JSON serializable` ## Specifications - Platform: `Fedora Linux 36 (Workstation Edition)` - Python Version: `3.10.7`