protected function addAliases($aliases)
    {
        if ($aliases == null) {
            return;
        }
        foreach ($aliases as $alias => $aliasClass) {
            $this->output->writeln('<info>Adding '.$aliasClass.' to Laravel config app.php file</info>');
            $this->addAlias("'$alias' => ".$aliasClass);
        }
    }