<?php
 
 namespace Illuminate\Contracts\Mail;
 
 interface Mailer
 {
     /**
      * Begin the process of mailing a mailable class instance.
      *
      * @param  mixed  $users
      * @return \Illuminate\Mail\PendingMail
      */
     public function to($users);
 
     /**
      * Begin the process of mailing a mailable class instance.
      *
      * @param  mixed  $users
      * @return \Illuminate\Mail\PendingMail
      */
     public function bcc($users);
 
     /**
      * Send a new message with only a raw text part.
      *
      * @param  string  $text
      * @param  mixed  $callback
      * @return void
      */
     public function raw($text, $callback);
 
     /**
      * Send a new message using a view.
      *
      * @param  string|array|\Illuminate\Contracts\Mail\Mailable  $view
      * @param  array  $data
      * @param  \Closure|string|null  $callback
      * @return void
      */
     public function send($view, array $data = [], $callback = null);
 
     /**
      * Get the array of failed recipients.
      *
      * @return array
      */
     public function failures();
 }