Generated Dart code lacks comments / api documentation

[shadone]

There seems to an issue with the output missing api docs from the original .proto file, but only if the code generated with "grpc" option.

For example see this protobuf

syntax = "proto3";

package service1;

service TestMethodDocsService {
  // This inline doc comment should be preserved.
  rpc SayHello (HelloRequest) returns (HelloReply) {}
}

message HelloRequest {
  string name = 1;
}

message HelloReply {
  string message = 1;
}

Then compare the generated code with and without the "grpc" option:

With "grpc" option

protoc --dart_out="grpc:generated-with-grpc" --plugin=./bin/protoc-gen-dart ./doc.proto

Without "grpc" option

protoc --dart_out="generated-without-grpc" --plugin=./bin/protoc-gen-dart ./doc.proto

The inline doc for the SayHello method is missing only when "grpc" option is specified