internal static async Task <CompletionContext> GetCompletionListContextAsync(
CompletionService service,
CompletionProvider provider,
Document document,
int position,
CompletionTrigger triggerInfo,
OptionSet options = null)
{
options = options ?? document.Project.Solution.Workspace.Options;
var text = await document.GetTextAsync();
var span = service.GetDefaultItemSpan(text, position);
var context = new CompletionContext(provider, document, position, span, triggerInfo, options, CancellationToken.None);
await provider.ProvideCompletionsAsync(context);
return(context);
}