title: Laravel - Service Provider - Bind multiple classes
body: <p>I know how to bind a single class:</p>
  
  <pre><code>public function register() {
      $this-&gt;app-&gt;bind('search', 'Laracasts\Search\Search');
  }
  </code></pre>
  
  <p>But imagine my <code>Laracasts\Search\</code> dir having these files:</p>
  
  <ul>
  <li>Search.php // class Search</li>
  <li>SearchX.php // class SearchX</li>
  <li>SearchY.php // class SearchY</li>
  <li>SearchZ.php // class SearchZ</li>
  </ul>
  
  <p>What is the best way to bind these four files/classes into the search facade?</p>
  
  <p>I read in another <a href="https://stackoverflow.com/questions/28290332/best-practices-for-custom-helpers-on-laravel-5/28360186#comment47536515_28360186">non-related question</a> that we can use a mapper. But how?</p>