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diff --git a/node_modules/uncss/node_modules/lodash/internal/baseSet.js b/node_modules/uncss/node_modules/lodash/internal/baseSet.js
new file mode 100644
index 000000000..ac2f78c6e
--- /dev/null
+++ b/node_modules/uncss/node_modules/lodash/internal/baseSet.js
@@ -0,0 +1,43 @@
+var assignValue = require('./assignValue'),
+    baseToPath = require('./baseToPath'),
+    isIndex = require('./isIndex'),
+    isKey = require('./isKey'),
+    isObject = require('../isObject');
+
+/**
+ * The base implementation of `_.set`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to set.
+ * @param {*} value The value to set.
+ * @param {Function} [customizer] The function to customize path creation.
+ * @returns {Object} Returns `object`.
+ */
+function baseSet(object, path, value, customizer) {
+  path = isKey(path, object) ? [path + ''] : baseToPath(path);
+
+  var index = -1,
+      length = path.length,
+      lastIndex = length - 1,
+      nested = object;
+
+  while (nested != null && ++index < length) {
+    var key = path[index];
+    if (isObject(nested)) {
+      var newValue = value;
+      if (index != lastIndex) {
+        var objValue = nested[key];
+        newValue = customizer ? customizer(objValue, key, nested) : undefined;
+        if (newValue === undefined) {
+          newValue = objValue == null ? (isIndex(path[index + 1]) ? [] : {}) : objValue;
+        }
+      }
+      assignValue(nested, key, newValue);
+    }
+    nested = nested[key];
+  }
+  return object;
+}
+
+module.exports = baseSet;