Microsoft.CodeAnalysis.AddImport.AbstractAddImportFeatureService<TSimpleNameSyntax>.GetDescription(Microsoft.CodeAnalysis.Document, Microsoft.CodeAnalysis.AddImport.AddImportPlacementOptions, Microsoft.CodeAnalysis.INamespaceOrTypeSymbol, Microsoft.CodeAnalysis.SemanticModel, Microsoft.CodeAnalysis.SyntaxNode, System.Threading.CancellationToken)