<?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  \Illuminate\Contracts\Mail\Mailable|string|array  $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();
  }