  auto Colon = SyntaxFactory::makeColonToken({}, Trivia::spaces(1));
  auto Int = SyntaxFactory::makeTypeIdentifier("Int", {},
                                               Trivia::spaces(1));
  auto NoEllipsis = TokenSyntax::missingToken(tok::identifier, "...");
  auto Equal = SyntaxFactory::makeEqualToken({}, Trivia::spaces(1));