title: How to generate OpenAPI 3 documentation from protobuf files
body: <p>I have an API generated from protobuf, and I would like to generate documentation conforming to the OpenAPI 3 spec. I've looked at a number of utilities but I haven't found a combination that works.</p>
  
  <p>Does anyone know of a path from protobuf to OpenAPI 3 that I can follow?</p>