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diff --git a/common/src/main/webapp/usageguide/appserver/node_modules/express/node_modules/merge-descriptors/index.js b/common/src/main/webapp/usageguide/appserver/node_modules/express/node_modules/merge-descriptors/index.js
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+++ b/common/src/main/webapp/usageguide/appserver/node_modules/express/node_modules/merge-descriptors/index.js
@@ -0,0 +1,60 @@
+/*!
+ * merge-descriptors
+ * Copyright(c) 2014 Jonathan Ong
+ * Copyright(c) 2015 Douglas Christopher Wilson
+ * MIT Licensed
+ */
+
+'use strict'
+
+/**
+ * Module exports.
+ * @public
+ */
+
+module.exports = merge
+
+/**
+ * Module variables.
+ * @private
+ */
+
+var hasOwnProperty = Object.prototype.hasOwnProperty
+
+/**
+ * Merge the property descriptors of `src` into `dest`
+ *
+ * @param {object} dest Object to add descriptors to
+ * @param {object} src Object to clone descriptors from
+ * @param {boolean} [redefine=true] Redefine `dest` properties with `src` properties
+ * @returns {object} Reference to dest
+ * @public
+ */
+
+function merge(dest, src, redefine) {
+ if (!dest) {
+ throw new TypeError('argument dest is required')
+ }
+
+ if (!src) {
+ throw new TypeError('argument src is required')
+ }
+
+ if (redefine === undefined) {
+ // Default to true
+ redefine = true
+ }
+
+ Object.getOwnPropertyNames(src).forEach(function forEachOwnPropertyName(name) {
+ if (!redefine && hasOwnProperty.call(dest, name)) {
+ // Skip desriptor
+ return
+ }
+
+ // Copy descriptor
+ var descriptor = Object.getOwnPropertyDescriptor(src, name)
+ Object.defineProperty(dest, name, descriptor)
+ })
+
+ return dest
+}