Microsoft.CodeAnalysis.VisualBasic.Completion.Providers.EnumCompletionProvider.GetSymbolsAsync(Microsoft.CodeAnalysis.Completion.CompletionContext, Microsoft.CodeAnalysis.VisualBasic.Extensions.ContextQuery.VisualBasicSyntaxContext, System.Int32, Microsoft.CodeAnalysis.Completion.CompletionOptions, System.Threading.CancellationToken)