feat:res

@@ -4,9 +4,10 @@ namespace Lackoxygen\TiktokShop\Response;
 
 use Illuminate\Contracts\Support\Arrayable;
 use Illuminate\Support\Arr;
+use JetBrains\PhpStorm\Internal\LanguageLevelTypeAware;
 use Lackoxygen\TiktokShop\Util\Json;
 
-class ResultSet implements Arrayable, \Countable
+class ResultSet implements Arrayable, \Countable, \ArrayAccess
 {
     /**
      * @var array|mixed
@@ -102,4 +103,45 @@ class ResultSet implements Arrayable, \Countable
 
         return $items;
     }
+
+    /**
+     * @param $offset
+     * @return void
+     */
+    public function offsetUnset($offset)
+    {
+        unset($this->items[$offset]);
+    }
+
+    /**
+     * @param $offset
+     * @param $value
+     * @return void
+     */
+    public function offsetSet($offset, $value)
+    {
+        if (is_null($offset)) {
+            $this->items[] = $value;
+        } else {
+            $this->items[$offset] = $value;
+        }
+    }
+
+    /**
+     * @param $offset
+     * @return mixed
+     */
+    public function offsetGet($offset)
+    {
+        return $this->items[$offset];
+    }
+
+    /**
+     * @param $offset
+     * @return bool
+     */
+    public function offsetExists($offset): bool
+    {
+        return isset($this->items, $offset);
+    }
 }