How to receive CloudEvent triggers?

[black-snow]

EventGrid can send events in CloudEvents v1 format - but how do I receive them in a function? I expected to see a func.CloudEvent just like func.EventGridEvent or some transformation, but "CloudEvent" yields 0 hits in this repo.

get_json() seems to give me the payload (.data), but what about the metadata? What about extension attributes?

[kevin-benton]

This would also be beneficial for the dapr pubsub bindings.