text: syntax = "proto2";
  
  package issue270.a;
  
  import "github.com/gogo/protobuf/gogoproto/gogo.proto";
  import "github.com/gogo/protobuf/test/issue270/b/b.proto";
  
  option (gogoproto.populate_all) = true;
  
  message A2 {
      optional issue270.b.B b = 1;
  }
  