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node_modules/core-js/internals/uid.js

@@ -0,0 +1,10 @@
+'use strict';
+var uncurryThis = require('../internals/function-uncurry-this');
+
+var id = 0;
+var postfix = Math.random();
+var toString = uncurryThis(1.0.toString);
+
+module.exports = function (key) {
+  return 'Symbol(' + (key === undefined ? '' : key) + ')_' + toString(++id + postfix, 36);
+};