Rename plugins to libs and update all file references

libs/stripe-php/lib/Service/BalanceService.php

@@ -0,0 +1,31 @@
+<?php
+
+// File generated from our OpenAPI spec
+
+namespace Stripe\Service;
+
+/**
+ * @phpstan-import-type RequestOptionsArray from \Stripe\Util\RequestOptions
+ *
+ * @psalm-import-type RequestOptionsArray from \Stripe\Util\RequestOptions
+ */
+class BalanceService extends AbstractService
+{
+    /**
+     * Retrieves the current account balance, based on the authentication that was used
+     * to make the request.  For a sample request, see <a
+     * href="/docs/connect/account-balances#accounting-for-negative-balances">Accounting
+     * for negative balances</a>.
+     *
+     * @param null|array{expand?: string[]} $params
+     * @param null|RequestOptionsArray|\Stripe\Util\RequestOptions $opts
+     *
+     * @return \Stripe\Balance
+     *
+     * @throws \Stripe\Exception\ApiErrorException if the request fails
+     */
+    public function retrieve($params = null, $opts = null)
+    {
+        return $this->request('get', '/v1/balance', $params, $opts);
+    }
+}