code: func FileDescriptorSet() *descriptor.FileDescriptorSet {
  	// We just need ONE of the service names to look up the FileDescriptorSet.
  	ret, err := discovery.GetDescriptorSet("crimson.Crimson")
  	if err != nil {
  		panic(err)
  	}
  	return ret
  }
docs: // FileDescriptorSet returns a descriptor set for this proto package, which
  // includes all defined services, and all transitive dependencies.
  //
  // Will not return nil.
  //
  // Do NOT modify the returned descriptor.