src/vs/workbench/services/themes/browser/productIconThemeData.ts/ProductIconThemeData/defaultTheme
class ProductIconThemeData:	static get defaultTheme(): ProductIconThemeData {
		let themeData = ProductIconThemeData._defaultProductIconTheme;
		if (!themeData) {
			themeData = ProductIconThemeData._defaultProductIconTheme = new ProductIconThemeData(DEFAULT_PRODUCT_ICON_THEME_ID, nls.localize('defaultTheme', 'Default'), DEFAULT_PRODUCT_ICON_THEME_SETTING_VALUE);
			themeData.isLoaded = true;
			themeData.extensionData = undefined;
			themeData.watch = false;
		}
		return themeData;
	}