// Required.
  optional string name = 2;
}

// Subject matches the originator of a request, as identified by the request authentication system. There are three
// ways of matching an originator; by user, group, or service account.
// +union
message Subject {
  // `kind` indicates which one of the other fields is non-empty.
  // Required
  // +unionDiscriminator

  // Required.
  optional string name = 2;
}

// Subject matches the originator of a request, as identified by the request authentication system. There are three
// ways of matching an originator; by user, group, or service account.
// +union
message Subject {
  // `kind` indicates which one of the other fields is non-empty.
  // Required
  // +unionDiscriminator

  // Required.
  optional string name = 2;
}

// Subject matches the originator of a request, as identified by the request authentication system. There are three
// ways of matching an originator; by user, group, or service account.
// +union
message Subject {
  // `kind` indicates which one of the other fields is non-empty.
  // Required
  // +unionDiscriminator

  // Required.
  optional string name = 2;
}

// Subject matches the originator of a request, as identified by the request authentication system. There are three
// ways of matching an originator; by user, group, or service account.
// +union
message Subject {
  // `kind` indicates which one of the other fields is non-empty.
  // Required
  // +unionDiscriminator