private static async Task <Document> RefactorAsync(
Document document,
string name,
MemberAccessExpressionSyntax memberAccess,
CancellationToken cancellationToken = default(CancellationToken))
{
SyntaxNode oldRoot = await document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
SimpleNameSyntax newNode = memberAccess.Name.WithTriviaFrom(memberAccess);
SyntaxNode newRoot = oldRoot.ReplaceNode(memberAccess, newNode);
newRoot = ((CompilationUnitSyntax)newRoot).AddUsings(CSharpFactory.UsingStaticDirective(SyntaxFactory.ParseName(name)));
return(document.WithSyntaxRoot(newRoot));
}