syntax = "proto3";
package merge;

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

message A {
  B B = 1 [(gogoproto.nullable) = false];
  repeated C c = 2 [(gogoproto.nullable) = false];
}

message B {
  int64 c = 1;
}

message C {
  int64 d = 1;
}