protected function evalDebugMethods($value, $name, $group)
    {
        $list = explode(',', $value);

        foreach ($list as $entry) {
            // Test for whitespace and the blacklist.
            if (in_array($entry, $this->methodBlacklist)) {
                $this->pool->messages->addMessage(
                    static::KEY_CONFIG_ERROR_DEBUG_BLACKLIST,
                    array($group, $name, $entry)
                );
                return false;
            }
            if (strpos($entry, ' ') !== false) {
                $this->pool->messages->addMessage(
                    static::KEY_CONFIG_ERROR_DEBUG_INVALID,
                    array($group, $name, $entry)
                );
                return false;
            }
        }

        return true;
    }