src/vs/workbench/services/themes/browser/workbenchThemeService.ts/WorkbenchThemeService/applyAndSetProductIconTheme
class WorkbenchThemeService:	private applyAndSetProductIconTheme(iconThemeData: ProductIconThemeData, silent = false): void {

		this.currentProductIconTheme = iconThemeData;

		_applyRules(iconThemeData.styleSheetContent!, productIconThemeRulesClassName);

		this.productIconThemeWatcher.update(iconThemeData);

		if (iconThemeData.id) {
			this.sendTelemetry(iconThemeData.id, iconThemeData.extensionData, 'productIcon');
		}
		if (!silent) {
			this.onProductIconThemeChange.fire(this.currentProductIconTheme);
		}
	}