Pantheon\Terminus\Commands\Import\CompleteCommand::complete PHP Method

    public function complete($site_name)
    {
        $site = $this->sites->get($site_name);
        $workflow = $site->completeMigration();
        while (!$workflow->checkProgress()) {
            // @TODO: Add Symfony progress bar to indicate that something is happening.
        }
        $this->log()->notice('The import of {site} has been marked as complete.', ['site' => $site->get('name')]);
    }