Module 640847

function(e){"use strict";e.exports=function(){if("function"!=typeof Symbol||"function"!=typeof Object.getOwnPropertySymbols)return!1;if("symbol"==typeof Symbol.iterator)return!0;var e={},t=Symbol("test"),n=Object(t);if("string"==typeof t||"[object Symbol]"!==Object.prototype.toString.call(t)||"[object Symbol]"!==Object.prototype.toString.call(n))return!1;for(var i in e[t]=42,e)return!1;if("function"==typeof Object.keys&&0!==Object.keys(e).length||"function"==typeof Object.getOwnPropertyNames&&0!==Object.getOwnPropertyNames(e).length)return!1;var r=Object.getOwnPropertySymbols(e);if(1!==r.length||r[0]!==t||!Object.prototype.propertyIsEnumerable.call(e,t))return!1;if("function"==typeof Object.getOwnPropertyDescriptor){var s=Object.getOwnPropertyDescriptor(e,t);if(42!==s.value||!0!==s.enumerable)return!1}return!0}}