title: Getting custom options of configurable products
body: <p>How do you get the custom options of configurable products on checkout? For simple products, it is easy as: </p>
  
  <pre><code>foreach ($product-&gt;getOptions() as $option) {
      echo $option-&gt;getTitle();
  } 
  </code></pre>
  
  <p>where $product is a simple product.</p>
  
  <p>However, this doesn’t work for configurable products.</p>