public function toMail(object $notifiable) 	{ 		return (new MailMessage) 					->subject('Referral Accepted!') 					->line($this->referrer . ' has accepted ' . $this->referred . ' invitation!') 					->action('Go to ' . setting('app_name'), url(config('custom.frontend_base_url'))) 					->line('Thank you for using our application!'); 	}