diff --git a/arkts/@arkts.collections.d.ets b/arkts/@arkts.collections.d.ets
index 8286c65709af0a1a8667c2b3b150e62dd4760e38..2542efd44fbaa92988c7577c7391f05891078f80 100644
--- a/arkts/@arkts.collections.d.ets
+++ b/arkts/@arkts.collections.d.ets
@@ -11972,33 +11972,19 @@ declare namespace collections {
      */
     values(): IterableIterator<int>;
     /**
-     * Returns the item at that index.
-     * 
-     * @param { int } index - The zero-based index of the desired code unit.
-     *     Throws error if index < 0 or index >= bitVector.length.
-     * @returns { int } The element in the bitVector matching the given index. 
-     * @throws { BusinessError } 10200001 - The value of index is out of range.
-     * @syscap SystemCapability.Utils.Lang
-     * @crossplatform
-     * @atomicservice
-     * @since 20
-     * @arkts 1.2
-     */
-    $_get(index: int): int;
-    /**
-     * Set the value of item at that index.
+     * Accesses or sets the element at the specified index in the BitVector.
      *
-     * @param { int } index - The index of the element to set.
-     *     Throws error if index < 0 or index >= bitVector.length.
-     * @param { int } value - The value to set at the specified index.
+     * @param { int } index - The index of the element to access or set.
+     *     Throws an error if index < 0 or index >= bitVector.length.
+     * @returns { int } The element in the BitVector at the given index.
      * @throws { BusinessError } 10200001 - The value of index is out of range.
      * @syscap SystemCapability.Utils.Lang
-     * @atomicservice
      * @crossplatform
+     * @atomicservice
      * @since 20
      * @arkts 1.2
      */
-    $_set(index: int, value: int): void;
+    [index: int]: int;
   }
 
   /**