Neos\Flow\Reflection\ReflectionService::isClassAbstract PHP Метод

    public function isClassAbstract($className)
    {
        $className = $this->prepareClassReflectionForUsage($className);
        return isset($this->classReflectionData[$className][self::DATA_CLASS_ABSTRACT]);
    }

 /**
  * Get all class names inside this namespace and return them as array.
  *
  * @param string $namespace
  * @return array Array of all class names inside a given namespace.
  */
 protected function getClassNamesInNamespace($namespace)
 {
     $affectedViewHelperClassNames = array();
     $allViewHelperClassNames = $this->reflectionService->getAllSubClassNamesForClass(\Neos\FluidAdaptor\Core\ViewHelper\AbstractViewHelper::class);
     foreach ($allViewHelperClassNames as $viewHelperClassName) {
         if ($this->reflectionService->isClassAbstract($viewHelperClassName)) {
             continue;
         }
         if (strncmp($namespace, $viewHelperClassName, strlen($namespace)) === 0) {
             $affectedViewHelperClassNames[] = $viewHelperClassName;
         }
     }
     sort($affectedViewHelperClassNames);
     return $affectedViewHelperClassNames;
 }