Deprecation: #83475 - Aggregate validator information in class schema 

See forge#83475

Description 

The method TYPO3CMSExtbaseMvcControllerActionController::getActionMethodParameters has been marked as deprecated and will be removed in TYPO3 v10.0

Impact 

The method was not considered public API and it is unlikely that the methods is used in the wild. If you rely on that method, please migrate your code base.

Affected Installations 

All installations that use that method.

Migration 

Use the ClassSchema class and get all necessary information from it. Example:

$reflectionService = $objectManager->get(\TYPO3\CMS\Extbase\Reflection\ReflectionService::class);
$methods = $reflectionService->getClassSchema($className)->getMethods();
$actions = array_filter($methods, function($method){
    return $method['isAction'];
});
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