src/vs/workbench/contrib/extensions/browser/extensionsWidgets.ts/ExtensionHoverWidget/getRecommendationMessage
class ExtensionHoverWidget:	private getRecommendationMessage(extension: IExtension): string | undefined {
		if (extension.state === ExtensionState.Installed) {
			return undefined;
		}
		const recommendation = this.extensionRecommendationsService.getAllRecommendationsWithReason()[extension.identifier.id.toLowerCase()];
		if (!recommendation?.reasonText) {
			return undefined;
		}
		const bgColor = this.themeService.getColorTheme().getColor(extensionButtonProminentBackground);
		return `<span style="color:${bgColor ? Color.Format.CSS.formatHex(bgColor) : '#ffffff'};">$(${starEmptyIcon.id})</span>&nbsp;${recommendation.reasonText}`;
	}