Base:
method
TryGetBaseList
Microsoft.CodeAnalysis.GenerateType.AbstractGenerateTypeService<TService, TSimpleNameSyntax, TObjectCreationExpressionSyntax, TExpressionSyntax, TTypeDeclarationSyntax, TArgumentSyntax>.TryGetBaseList(TExpressionSyntax, out Microsoft.CodeAnalysis.GenerateType.TypeKindOptions)