So siehts ganz gut aus !

node_modules/es6-map/implement.js

@@ -0,0 +1,7 @@
+'use strict';
+
+if (!require('./is-implemented')()) {
+	Object.defineProperty(require('es5-ext/global'), 'Map',
+		{ value: require('./polyfill'), configurable: true, enumerable: false,
+			writable: true });
+}