Hi again! As part of migrating to Python 3, I need to migrate from 
logservice 
<https://cloud.google.com/appengine/docs/standard/python/refdocs/google.appengine.api.logservice.logservice>
 
to the StackDriver Logging API 
<https://cloud.google.com/logging/docs/reference/api-overview>. I have 
google-cloud-logging <https://pypi.org/project/google-cloud-logging/> 
installed, and I can successfully fetch GAE application logs with eg:

>>> from google.cloud.logging_v2 import LoggingServiceV2Client
>>> entries = LoggingServiceV2Client().list_log_entries(('projects/brid-gy'
,),
         filter_='resource.type="gae_app" AND 
protoPayload.@type="type.googleapis.com/google.appengine.logging.v1.RequestLog"'
)
>>> print(next(iter(entries)))
proto_payload {
  type_url: "type.googleapis.com/google.appengine.logging.v1.RequestLog"
  value: "\n\ts~brid-gy\022\0018\032R5d..."
}
...

This gets me a LogEntry with text application logs in the 
proto_payload.value field. How do I deserialize that field? I've found lots 
of related mentions in the docs - links below - but nothing pointing me to 
a google.appengine.logging.v1.RequestLog protobuf generated class anywhere 
that I can use, if that's even the right idea. Has anyone done this?

https://googleapis.dev/python/logging/latest/gapic/v2/types.html#google.cloud.logging_v2.types.LogEntry.proto_payload
https://cloud.google.com/logging/docs/reference/v2/rpc/google.appengine.logging.v1#requestlog
https://cloud.google.com/logging/docs/reference/v2/rest/v2/LogEntry#FIELDS.proto_payload
https://cloud.google.com/logging/docs/api/v2/resource-list#resource-indexes
https://groups.google.com/d/topic/google-cloud-dev/Xr6tZxOIaJY/discussion

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