Static analysis fixes.

phpstan.neon

@@ -22,7 +22,6 @@ parameters:
 
         # Supervisor functions that do exist but aren't annotated properly in the connector lib.
         - '#Call to an undefined method Supervisor\\Supervisor::reloadConfig().#'
-        - '#Call to an undefined method Supervisor\\Supervisor::signalProcess().#'
 
     dynamicConstantNames:
         - APP_IS_COMMAND_LINE

src/Controller/Api/Admin/RolesController.php

@@ -95,7 +95,7 @@ class RolesController extends AbstractGenericCrudController
      * @inheritdoc
      */
 
-    protected function _denormalizeToRecord($data, $record, array $context = []): object
+    protected function _denormalizeToRecord($data, $record = null, array $context = []): object
     {
         return parent::_denormalizeToRecord($data, $record, array_merge($context, [
             AbstractNormalizer::CALLBACKS => [