src/vs/editor/standalone/browser/standaloneThemeService.ts/StandaloneTheme/constructor
class StandaloneTheme:	constructor(name: string, standaloneThemeData: IStandaloneThemeData) {
		this.themeData = standaloneThemeData;
		const base = standaloneThemeData.base;
		if (name.length > 0) {
			if (isBuiltinTheme(name)) {
				this.id = name;
			} else {
				this.id = base + ' ' + name;
			}
			this.themeName = name;
		} else {
			this.id = base;
			this.themeName = base;
		}
		this.colors = null;
		this.defaultColors = Object.create(null);
		this._tokenTheme = null;
	}