Microsoft.CodeAnalysis.GenerateType.AbstractGenerateTypeService<TService, TSimpleNameSyntax, TObjectCreationExpressionSyntax, TExpressionSyntax, TTypeDeclarationSyntax, TArgumentSyntax>.TryAddUsingsOrImportToDocumentAsync(Microsoft.CodeAnalysis.Solution, Microsoft.CodeAnalysis.SyntaxNode, Microsoft.CodeAnalysis.Document, TSimpleNameSyntax, System.String, System.Threading.CancellationToken)