Added CustomFieldBehavior to make phpstan happy

lib/craft/behaviors/CustomFieldBehavior.php

@@ -0,0 +1,33 @@
+<?php
+/**
+ * @link http://craftcms.com/
+ * @copyright Copyright (c) Pixel & Tonic, Inc.
+ * @license http://craftcms.com/license
+ */
+
+namespace craft\behaviors;
+
+use yii\base\Behavior;
+
+/**
+ * This file is never loaded at runtime. It’s only here for PHPStan’n sake.
+ *
+ * @internal
+ */
+class CustomFieldBehavior extends Behavior
+{
+    /**
+     * @var bool Whether the behavior should provide methods based on the field handles.
+     */
+    public bool $hasMethods = false;
+
+    /**
+     * @var bool Whether properties on the class should be settable directly.
+     */
+    public bool $canSetProperties = true;
+
+    /**
+     * @var string[] List of supported field handles.
+     */
+    public static $fieldHandles = [];
+}

lib/craft/bootstrap.php

@@ -0,0 +1,3 @@
+<?php
+
+define('CRAFT_BASE_PATH', __DIR__);

phpstan.neon

@@ -1,7 +1,10 @@
 includes:
     - vendor/craftcms/phpstan/phpstan.neon
-
 parameters:
     level: 1
     paths:
-        - src
+        - src
+    scanFiles:
+        - lib/craft/behaviors/CustomFieldBehavior.php
+    bootstrapFiles:
+        - lib/craft/bootstrap.php

src/Scout.php

@@ -160,6 +160,7 @@ function(ElementEvent $event) {
                     $element = $event->element;
                     $baseElement = ElementHelper::rootElementIfCanonical($element);
                     if ($baseElement) {
+                        /** @phpstan-var UrlManager $urlManager */
                         if (!$baseElement->hasMethod('searchable') || !$baseElement->shouldBeSearchable()) {
                             return;
                         }
@@ -171,7 +172,7 @@ function(ElementEvent $event) {
                                 ->push(
                                     new IndexElement([
                                         'id' => $baseElement->id,
-                                        'siteId' => $baseElement->site ? $baseElement->site->id : null
+                                        'siteId' => $baseElement->site ? $baseElement->site->id : null,
                                     ])
                                 );
                         } else {