public async Task <IDocumentOptions> GetOptionsForDocumentAsync(Document document, CancellationToken cancellationToken)
{
var mimeChain = DesktopService.GetMimeTypeInheritanceChainForRoslynLanguage(document.Project.Language);
if (mimeChain == null)
{
return(null);
}
var project = TypeSystemService.GetMonoProject(document.Project);
var policy = project.Policies.Get <TextStylePolicy> (mimeChain);
return(new TextDocumentOptions(policy));
}