SonarLint.VisualStudio.Integration.Vsix.SolutionAnalysisRequester.FindOptionService C# (CSharp) Method

        private void FindOptionService()
        {
            const string optionServiceTypeName = "Microsoft.CodeAnalysis.Options.IOptionService";
            const string CodeAnalysisWorkspacesAssemblyName = "Microsoft.CodeAnalysis.Workspaces";

            Type optionServiceType = typeof(PerLanguageOption<int>).Assembly.GetType(optionServiceTypeName, false);
            if (optionServiceType == null)
            {
                VsShellUtils.WriteToSonarLintOutputPane(this.serviceProvider, Strings.MissingResourceAtLocation,
                    optionServiceTypeName, CodeAnalysisWorkspacesAssemblyName);
                Debug.Fail($"{optionServiceTypeName} could not be found in {CodeAnalysisWorkspacesAssemblyName}");
                return;
            }

            this.optionService = this.workspace.Services.GetType()
                ?.GetMethod("GetService")
                ?.MakeGenericMethod(optionServiceType)
                ?.Invoke(workspace.Services, null);

            Debug.Assert(this.optionService != null, "Option service is null");

            this.optionServiceSetOptionsMethod = optionServiceType?.GetMethod("SetOptions");
            this.optionServiceGetOptionsMethod = optionServiceType?.GetMethod("GetOptions");

            Debug.Assert(this.optionServiceSetOptionsMethod != null, "IOptionService.SetOptions method is not found");
            Debug.Assert(this.optionServiceGetOptionsMethod != null, "IOptionService.GetOptions method is not found");
        }