+/*!
+ * is-plain-object <https://github.com/jonschlinkert/is-plain-object>
+ *
+ * Copyright (c) 2014-2017, Jon Schlinkert.
+ * Released under the MIT License.
+ */
+
+'use strict';
+
+var isObject = require('isobject');
+
+function isObjectObject(o) {
+ return isObject(o) === true
+ && Object.prototype.toString.call(o) === '[object Object]';
+}
+
+module.exports = function isPlainObject(o) {
+ var ctor,prot;
+
+ if (isObjectObject(o) === false) return false;
+
+ // If has modified constructor
+ ctor = o.constructor;
+ if (typeof ctor !== 'function') return false;
+
+ // If has modified prototype
+ prot = ctor.prototype;
+ if (isObjectObject(prot) === false) return false;
+
+ // If constructor does not have an Object-specific method
+ if (prot.hasOwnProperty('isPrototypeOf') === false) {
+ return false;
+ }
+
+ // Most likely a plain Object
+ return true;
+};