Base:
method
ShouldProvideAvailableSymbolsInCurrentContextAsync
Microsoft.CodeAnalysis.Completion.Providers.AbstractRecommendationServiceBasedCompletionProvider<TSyntaxContext>.ShouldProvideAvailableSymbolsInCurrentContextAsync(Microsoft.CodeAnalysis.Completion.CompletionContext, TSyntaxContext, System.Int32, Microsoft.CodeAnalysis.Completion.CompletionOptions, System.Threading.CancellationToken)