add code

src/helpers.php

@@ -0,0 +1,32 @@
+<?php
+
+if (! function_exists('uses_trait')) {
+    /** Check if a class or an object uses the specified trait. */
+    function uses_trait(object|string $class, string $trait): bool
+    {
+        return in_array($trait, class_uses_recursive($class), true);
+    }
+}
+
+if (! function_exists('is_simple_array')) {
+    /** Checks if a variadic array only has one element that's an array.
+     * @example [['foo', 'bar']] is a simple array
+     * @example [['foo'], ['bar']] is not a simple array
+     */
+    function is_simple_array(array $variadicArray): bool
+    {
+        return count($variadicArray) === 1 && isset($variadicArray[0]) && is_array($variadicArray[0]);
+    }
+}
+
+if (! function_exists('variadic_array')) {
+    /** Converts [[a]] into [a] and [a, b] into [a, b] */
+    function variadic_array(array $items): array
+    {
+        if (is_simple_array($items)) {
+            $items = $items[0];
+        }
+
+        return $items;
+    }
+}