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diff --git a/node_modules/uncss/node_modules/lodash/internal/baseSortedIndexBy.js b/node_modules/uncss/node_modules/lodash/internal/baseSortedIndexBy.js
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+++ b/node_modules/uncss/node_modules/lodash/internal/baseSortedIndexBy.js
@@ -0,0 +1,56 @@
+/** Used as references for the maximum length and index of an array. */
+var MAX_ARRAY_LENGTH = 4294967295,
+    MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1;
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeFloor = Math.floor,
+    nativeMin = Math.min;
+
+/**
+ * The base implementation of `_.sortedIndexBy` and `_.sortedLastIndexBy`
+ * which invokes `iteratee` for `value` and each element of `array` to compute
+ * their sort ranking. The iteratee is invoked with one argument; (value).
+ *
+ * @private
+ * @param {Array} array The sorted array to inspect.
+ * @param {*} value The value to evaluate.
+ * @param {Function} iteratee The iteratee invoked per element.
+ * @param {boolean} [retHighest] Specify returning the highest qualified index.
+ * @returns {number} Returns the index at which `value` should be inserted into `array`.
+ */
+function baseSortedIndexBy(array, value, iteratee, retHighest) {
+  value = iteratee(value);
+
+  var low = 0,
+      high = array ? array.length : 0,
+      valIsNaN = value !== value,
+      valIsNull = value === null,
+      valIsUndef = value === undefined;
+
+  while (low < high) {
+    var mid = nativeFloor((low + high) / 2),
+        computed = iteratee(array[mid]),
+        isDef = computed !== undefined,
+        isReflexive = computed === computed;
+
+    if (valIsNaN) {
+      var setLow = isReflexive || retHighest;
+    } else if (valIsNull) {
+      setLow = isReflexive && isDef && (retHighest || computed != null);
+    } else if (valIsUndef) {
+      setLow = isReflexive && (retHighest || isDef);
+    } else if (computed == null) {
+      setLow = false;
+    } else {
+      setLow = retHighest ? (computed <= value) : (computed < value);
+    }
+    if (setLow) {
+      low = mid + 1;
+    } else {
+      high = mid;
+    }
+  }
+  return nativeMin(high, MAX_ARRAY_INDEX);
+}
+
+module.exports = baseSortedIndexBy;