stylelint-bundle-worker.js
function uniqSetWithForEach(arr) {
	var ret = [];

	(new Set(arr)).forEach(function (el) {
		ret.push(el);
	});

	return ret;
}
function uniqSetWithForEach(arr) {
	var ret = [];

	(new Set(arr)).forEach(function (el) {
		ret.push(el);
	});

	return ret;
}
3 - a standard Set type is defined and it has a forEach method