Neos.ContentRepository/Classes/Domain/Factory/NodeFactory.php
public static function getNodeInterfaceImplementations($objectManager)
    {
        $reflectionService = $objectManager->get(ReflectionService::class);
        $nodeImplementations = $reflectionService->getAllImplementationClassNamesForInterface(NodeInterface::class);
        return $nodeImplementations;
    }
public static function getNodeInterfaceImplementations($objectManager)
    {
        $reflectionService = $objectManager->get(ReflectionService::class);
        $nodeImplementations = $reflectionService->getAllImplementationClassNamesForInterface(NodeInterface::class);
        return $nodeImplementations;
    }
public static function getNodeInterfaceImplementations ( $ objectManager ) { $ reflectionService = $ objectManager -> get ( ReflectionService :: class ) ; $ nodeImplementations = $ reflectionService -> getAllImplementationClassNamesForInterface ( NodeInterface :: class ) ; return $ nodeImplementations ; }
Get all NodeInterface implementations to check if a configured node class is in there.

@param ObjectManagerInterface $objectManager
@return array
@Flow\CompileStatic
Get all NodeInterface implementations to check if a configured node class is in there .