add descriptor fix

Author: bshaffer

SecurityCenter/composer.json

@@ -7,7 +7,10 @@
         "psr-4": {
             "Google\\Cloud\\SecurityCenter\\": "src",
             "GPBMetadata\\Google\\Cloud\\Securitycenter\\": "metadata"
-        }
+        },
+        "files": [
+            "metadata/descriptor_fix.php"
+        ]
     },
     "autoload-dev": {
         "psr-4": {

SecurityCenter/metadata/descriptor_fix.php

@@ -0,0 +1,55 @@
+<?php
+/*
+ * Copyright 2026 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * IMPORTANT: This file prevents an exception when `PBObject` is used.
+ * The `Object` class from `google/cloud/securitycenter/v1/kubernetes.proto` was manually
+ * renamed to `PBObject` in PHP to avoid a conflict with a PHP reserved keyword.
+ * This file ensures that the `PBObject` class is correctly registered with the
+ * Protobuf descriptor pool under its original `Object` descriptor.
+ *
+ * This file can be removed once the protobuf library introduces a fix for
+ * descriptor pool issues when classes are renamed due to reserved keywords.
+ * @see https://github.com/protocolbuffers/protobuf/pull/27456
+ */
+namespace GPBMetadata\Google\Cloud\Securitycenter\V1 {
+
+    class KubernetesDescriptorFix
+    {
+        public static $is_initialized = false;
+
+        public static function initOnce() {
+            if (static::$is_initialized == true) {
+                return;
+            }
+
+            // This is required to load the descriptor for PBObject
+            \GPBMetadata\Google\Cloud\Securitycenter\V1\Kubernetes::initOnce();
+
+            $pool = \Google\Protobuf\Internal\DescriptorPool::getGeneratedPool();
+            $pool->addMessage(
+                'google.cloud.securitycenter.v1.Kubernetes.Object',
+                \Google\Cloud\SecurityCenter\V1\Kubernetes\PBObject::class
+            )->finalizeToPool();
+
+            static::$is_initialized = true;
+        }
+    }
+
+    KubernetesDescriptorFix::initOnce();
+}
+

composer.json

@@ -797,7 +797,8 @@
             "Grafeas\\": "Grafeas/src"
         },
         "files": [
-            "BigQueryStorage/metadata/descriptor_fix.php"
+            "BigQueryStorage/metadata/descriptor_fix.php",
+            "SecurityCenter/metadata/descriptor_fix.php"
         ]
     },
     "autoload-dev": {