--- /dev/null
+/*!
+ * is-descriptor <https://github.com/jonschlinkert/is-descriptor>
+ *
+ * Copyright (c) 2015-2017, Jon Schlinkert.
+ * Released under the MIT License.
+ */
+
+'use strict';
+
+var typeOf = require('kind-of');
+var isAccessor = require('is-accessor-descriptor');
+var isData = require('is-data-descriptor');
+
+module.exports = function isDescriptor(obj, key) {
+ if (typeOf(obj) !== 'object') {
+ return false;
+ }
+ if ('get' in obj) {
+ return isAccessor(obj, key);
+ }
+ return isData(obj, key);
+};