Microsoft.CodeAnalysis.CodeRefactorings.SyncNamespace.AbstractSyncNamespaceCodeRefactoringProvider<TNamespaceDeclarationSyntax, TCompilationUnitSyntax, TMemberDeclarationSyntax>.TryGetApplicableInvocationNodeAsync(Microsoft.CodeAnalysis.Document, Microsoft.CodeAnalysis.Text.TextSpan, System.Threading.CancellationToken)