npm and error messages

node_modules/webpack/lib/removeAndDo.js

@@ -0,0 +1,15 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+module.exports = function removeAndDo(collection, thing, action) {
+	const idx = this[collection].indexOf(thing);
+	const hasThingInCollection = idx >= 0;
+	if(hasThingInCollection) {
+		this[collection].splice(idx, 1);
+		thing[action](this);
+	}
+	return hasThingInCollection;
+};