protected function setProcessors(OptionsInterface $options, ProfileInterface $profile)
    {
        if (isset($options->prefix) && $profile instanceof RedisProfile) {
            // NOTE: directly using __get('prefix') is actually a workaround for
            // HHVM 2.3.0. It's correct and respects the options interface, it's
            // just ugly. We will remove this hack when HHVM will fix re-entrant
            // calls to __get() once and for all.

            $profile->setProcessor($options->__get('prefix'));
        }
    }