TAS treatment for language recommendation prompt (#133494)

src/vs/workbench/contrib/extensions/browser/fileBasedRecommendations.ts

@@ -25,6 +25,7 @@ import { IExtensionService } from 'vs/workbench/services/extensions/common/exten
 import { IModelService } from 'vs/editor/common/services/modelService';
 import { IModeService } from 'vs/editor/common/services/modeService';
 import { IExtensionRecommendationNotificationService, RecommendationsNotificationResult, RecommendationSource } from 'vs/platform/extensionRecommendations/common/extensionRecommendations';
+import { ITASExperimentService } from 'vs/workbench/services/experiment/common/experimentService';
 import { distinct } from 'vs/base/common/arrays';
 import { DisposableStore } from 'vs/base/common/lifecycle';
 import { CellUri } from 'vs/workbench/contrib/notebook/common/notebookCommon';
@@ -103,9 +104,12 @@ export class FileBasedRecommendations extends ExtensionRecommendations {
 		@IExtensionRecommendationNotificationService private readonly extensionRecommendationNotificationService: IExtensionRecommendationNotificationService,
 		@IExtensionIgnoredRecommendationsService private readonly extensionIgnoredRecommendationsService: IExtensionIgnoredRecommendationsService,
 		@IFileService private readonly fileService: IFileService,
+		@ITASExperimentService private tasExperimentService: ITASExperimentService,
 	) {
 		super();
 
+		this.tasExperimentService = tasExperimentService;
+
 		if (productService.extensionTips) {
 			forEach(productService.extensionTips, ({ key, value }) => this.extensionTips.set(key.toLowerCase(), value));
 		}
@@ -278,7 +282,9 @@ export class FileBasedRecommendations extends ExtensionRecommendations {
 			return false;
 		}
 
-		this.extensionRecommendationNotificationService.promptImportantExtensionsInstallNotification([extensionId], localize('reallyRecommended', "Do you want to install the recommended extensions for {0}?", name), `@id:${extensionId}`, RecommendationSource.FILE)
+		const message = await this.tasExperimentService.getTreatment<string>('languageRecommendationMessage') ?? localize('reallyRecommended', "Do you want to install the recommended extensions for {0}?", name);
+
+		this.extensionRecommendationNotificationService.promptImportantExtensionsInstallNotification([extensionId], message, `@id:${extensionId}`, RecommendationSource.FILE)
 			.then(result => {
 				if (result === RecommendationsNotificationResult.Accepted) {
 					this.addToPromptedRecommendations(language, [extensionId]);