pebble/third_party/nanopb/tests/regression/issue_544/submsg_callback.proto

syntax = "proto2";

import "nanopb.proto";

message SubMessage {
    required uint32 foo = 1;
}

message MyMessage {
    oneof oneof {
        SubMessage submsg = 1 [(nanopb).submsg_callback = true];
    }
}