Re-add stripe php library v 10.5.0, git errored because it had it's own git folder

vendor/stripe-php-10.5.0/lib/ApiOperations/SingletonRetrieve.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace Stripe\ApiOperations;
+
+/**
+ * Trait for retrievable singleton resources. Adds a `retrieve()` static method to the
+ * class.
+ *
+ * This trait should only be applied to classes that derive from SingletonApiResource.
+ */
+trait SingletonRetrieve
+{
+    /**
+     * @param array|string $id the ID of the API resource to retrieve,
+     *     or an options array containing an `id` key
+     * @param null|array|string $opts
+     *
+     * @throws \Stripe\Exception\ApiErrorException if the request fails
+     *
+     * @return static
+     */
+    public static function retrieve($opts = null)
+    {
+        $opts = \Stripe\Util\RequestOptions::parse($opts);
+        $instance = new static(null, $opts);
+        $instance->refresh();
+
+        return $instance;
+    }
+}