title: How to find element that has multiple class in selenium
body: <p>I have an element with 3 classes which I need to find with selenium</p>
  
  <pre><code>&lt;button style="padding:2px 7px; background-color:#4caeea" 
    class="btn btn-xs btn-custom" &lt;/button&gt;
  </code></pre>
  
  <p>I could not find it with :  <code>By.classname("btn btn-xs btn-custom")</code></p>
  
  <p>I do not want to use <strong>xpath &amp; cssSelector</strong> . 
  What other options do I have ?</p>