syntax = "proto3";

import "yt/yt_proto/yt/formats/extension.proto";

package NYT.NTestingProto3;

option (NYT.file_default_field_flags) = SERIALIZATION_YT;

message TWithOptional
{
    optional int64 x = 1;
}

message TWithOptionalMessage
{
    optional TWithOptional x = 1;
}