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diff --git a/node_modules/uncss/node_modules/lodash/internal/assignInDefaults.js b/node_modules/uncss/node_modules/lodash/internal/assignInDefaults.js
new file mode 100644
index 000000000..dd351c0e8
--- /dev/null
+++ b/node_modules/uncss/node_modules/lodash/internal/assignInDefaults.js
@@ -0,0 +1,27 @@
+var eq = require('../eq');
+
+/** Used for built-in method references. */
+var objectProto = global.Object.prototype;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used by `_.defaults` to customize its `_.assignIn` use.
+ *
+ * @private
+ * @param {*} objValue The destination value.
+ * @param {*} srcValue The source value.
+ * @param {string} key The key of the property to assign.
+ * @param {Object} object The parent object of `objValue`.
+ * @returns {*} Returns the value to assign.
+ */
+function assignInDefaults(objValue, srcValue, key, object) {
+  if (objValue === undefined ||
+      (eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key))) {
+    return srcValue;
+  }
+  return objValue;
+}
+
+module.exports = assignInDefaults;