protected function showSeeds(Migrator $migrator)
    {
        $this->line('<comment>Seeds</comment>');

        $seeds = $migrator->seedNames();

        if (count($seeds) > 0) {
            $default_seed = $migrator->defaultSeed();

            foreach ($seeds as $seed) {
                $class = $migrator->seedClass($seed);

                $status_mark = ' ';
                $default_mark = $seed == $default_seed ? '(default)' : '';

                if (!class_exists($class)) {
                    $this->line("{$status_mark} <info>[{$seed}]</info> <error>{$class}</error>");
                    $this->line('');
                    $this->error('Error: Class not found.');
                    continue;
                }

                $this->line("{$status_mark} <comment>{$default_mark}</comment><info>[{$seed}]</info> {$class}");
            }

            if ($default_seed && !in_array($default_seed, $seeds)) {
                $this->line('');
                $this->error("Error: default seed '{$default_seed}' is not defined.");
            }
        } else {
            $this->info('Nothing.');
        }

        $this->line('');
    }