vendor/github.com/gogo/protobuf/test/importcustom-issue389/imported/a.proto

syntax = "proto3";
package imported;

import "github.com/gogo/protobuf/gogoproto/gogo.proto";

option (gogoproto.sizer_all) = true;
option (gogoproto.marshaler_all) = true;
option (gogoproto.unmarshaler_all) = true;
option (gogoproto.testgen_all) = true;
option (gogoproto.populate_all) = true;
option (gogoproto.equal_all) = true;

message A {
    string f1 = 1;
}