src/vs/workbench/services/themes/browser/workbenchThemeService.ts/WorkbenchThemeService/sendTelemetry
class WorkbenchThemeService:	private sendTelemetry(themeId: string, themeData: ExtensionData | undefined, themeType: string) {
		if (themeData) {
			const key = themeType + themeData.extensionId;
			if (!this.themeExtensionsActivated.get(key)) {
				type ActivatePluginClassification = {
					id: { classification: 'PublicNonPersonalData', purpose: 'FeatureInsight' };
					name: { classification: 'PublicNonPersonalData', purpose: 'FeatureInsight' };
					isBuiltin: { classification: 'SystemMetaData', purpose: 'FeatureInsight', isMeasurement: true };
					publisherDisplayName: { classification: 'SystemMetaData', purpose: 'FeatureInsight' };
					themeId: { classification: 'PublicNonPersonalData', purpose: 'FeatureInsight' };
				};
				type ActivatePluginEvent = {
					id: string;
					name: string;
					isBuiltin: boolean;
					publisherDisplayName: string;
					themeId: string;
				};
				this.telemetryService.publicLog2<ActivatePluginEvent, ActivatePluginClassification>('activatePlugin', {
					id: themeData.extensionId,
					name: themeData.extensionName,
					isBuiltin: themeData.extensionIsBuiltin,
					publisherDisplayName: themeData.extensionPublisher,
					themeId: themeId
				});
				this.themeExtensionsActivated.set(key, true);
			}
		}
	}