private static SyntaxNode ConvertLocalFunctionToAsync(LocalFunctionStatementSyntax localFunction)
{
var token = localFunction.GetFirstToken();
return(localFunction
.ReplaceToken(token, token.WithLeadingTrivia(TriviaList()))
.AddModifiers(Token(token.LeadingTrivia, SyntaxKind.AsyncKeyword, TriviaList(Space)))
.WithAdditionalAnnotations(Formatter.Annotation));
}