Neos\Flow\Mvc\Controller\ActionController::getActionValidateAnnotationData PHP Method

    public static function getActionValidateAnnotationData($objectManager)
    {
        $reflectionService = $objectManager->get(ReflectionService::class);
        $result = [];
        $className = get_called_class();
        $methodNames = get_class_methods($className);
        foreach ($methodNames as $methodName) {
            if (strlen($methodName) > 6 && strpos($methodName, 'Action', strlen($methodName) - 6) !== false) {
                $validateAnnotations = $reflectionService->getMethodAnnotations($className, $methodName, Flow\Validate::class);
                $result[$methodName] = array_map(function ($validateAnnotation) {
                    return ['type' => $validateAnnotation->type, 'options' => $validateAnnotation->options, 'argumentName' => $validateAnnotation->argumentName];
                }, $validateAnnotations);
            }
        }
        return $result;
    }