So siehts ganz gut aus !

node_modules/core-js/modules/_wks.js

@@ -0,0 +1,11 @@
+var store = require('./_shared')('wks');
+var uid = require('./_uid');
+var Symbol = require('./_global').Symbol;
+var USE_SYMBOL = typeof Symbol == 'function';
+
+var $exports = module.exports = function (name) {
+  return store[name] || (store[name] =
+    USE_SYMBOL && Symbol[name] || (USE_SYMBOL ? Symbol : uid)('Symbol.' + name));
+};
+
+$exports.store = store;