src/vs/editor/standalone/browser/standaloneThemeService.ts/getBuiltinRules
function getBuiltinRules(builtinTheme: BuiltinTheme): IStandaloneThemeData {
	switch (builtinTheme) {
		case VS_THEME_NAME:
			return vs;
		case VS_DARK_THEME_NAME:
			return vs_dark;
		case HC_BLACK_THEME_NAME:
			return hc_black;
		case HC_LIGHT_THEME_NAME:
			return hc_light;
	}
}