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diff --git a/node_modules/grunt-uncss/node_modules/lodash/_MapCache.js b/node_modules/grunt-uncss/node_modules/lodash/_MapCache.js
new file mode 100644
index 000000000..4a4eea7bf
--- /dev/null
+++ b/node_modules/grunt-uncss/node_modules/lodash/_MapCache.js
@@ -0,0 +1,32 @@
+var mapCacheClear = require('./_mapCacheClear'),
+    mapCacheDelete = require('./_mapCacheDelete'),
+    mapCacheGet = require('./_mapCacheGet'),
+    mapCacheHas = require('./_mapCacheHas'),
+    mapCacheSet = require('./_mapCacheSet');
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+  var index = -1,
+      length = entries == null ? 0 : entries.length;
+
+  this.clear();
+  while (++index < length) {
+    var entry = entries[index];
+    this.set(entry[0], entry[1]);
+  }
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+module.exports = MapCache;