protected function _getSubClassName(\ReflectionClass $rClass)
    {
        $subClassReader = $this->annotationReaderFactory->getReaderForClass($rClass);
        /**
         * @var Annotations\JsonTypeName $subNameA
         */
        $subNameA = $subClassReader->getSingleClassAnnotation($this->annNS . 'JsonTypeName');
        if (isset($subNameA)) {
            return $subNameA->getName();
        } else {
            return $rClass->getName();
        }

    }