--- /dev/null
+/*!
+ * for-in <https://github.com/jonschlinkert/for-in>
+ *
+ * Copyright (c) 2014-2017, Jon Schlinkert.
+ * Released under the MIT License.
+ */
+
+'use strict';
+
+module.exports = function forIn(obj, fn, thisArg) {
+ for (var key in obj) {
+ if (fn.call(thisArg, obj[key], key, obj) === false) {
+ break;
+ }
+ }
+};