public function toMail(object $notifiable) 	{ 		return (new MailMessage) 					->subject('You\'ve been invited to ' . setting('app_name')) 					->line($this->referrer . ' has invited you to start using ' . setting('app_name') . '!') 					->line(__('referrals.mail-points')) 					->action('Register!', url(config('custom.frontend_registration_url'), ['email' => $this->email])) 					->line('Thank you for using our application!'); 	}