Microsoft.CodeAnalysis.GenerateType.AbstractGenerateTypeService<TService, TSimpleNameSyntax, TObjectCreationExpressionSyntax, TExpressionSyntax, TTypeDeclarationSyntax, TArgumentSyntax>.GetOrGenerateEnclosingNamespaceSymbolAsync(Microsoft.CodeAnalysis.INamedTypeSymbol, System.String[], Microsoft.CodeAnalysis.Document, Microsoft.CodeAnalysis.SyntaxNode, System.Threading.CancellationToken)