/**
  * Parse the additivity option for a non-root category.
  *
  * @param array $props array of properties
  * @param Logger $cat
  * @param string $loggerName
  */
 private function parseAdditivityForLogger($props, Ideasa_Log4php_Logger $cat, $loggerName)
 {
     $value = Ideasa_Log4php_Helpers_LoggerOptionConverter::findAndSubst(self::ADDITIVITY_PREFIX . $loggerName, $props);
     $additivity = Ideasa_Log4php_Helpers_LoggerOptionConverter::toBoolean($value, true);
     $cat->setAdditivity($additivity);
 }