class Test {
  final CreationMechanism creationMechanism;
  final @Nullable String creationUserAgent;
  final ClientId clientId;
  final @Nullable String creationUserAgentXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX;
  final Token externalId;

  {
    final CreationMechanism creationMechanism;
    final @Nullable String creationUserAgent;
    final ClientId clientId;
    final @Nullable String creationUserAgentXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX;
    final Token externalId;
  }
}

class Test {
  final CreationMechanism creationMechanism;
  @Nullable final String creationUserAgent;
  final ClientId clientId;
  @Nullable final String creationUserAgentXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX;
  final Token externalId;

  {
    final CreationMechanism creationMechanism;
    @Nullable final String creationUserAgent;
    final ClientId clientId;
    @Nullable final String creationUserAgentXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX;
    final Token externalId;
  }
}

class Test {

  @Nullable
  final String creationUserAgent;

  {
    @Nullable
    final String creationUserAgent;
  }

  {

    @Nullable
    final String creationUserAgent;

  }
}