title: Set style to GWT ComboBox items
body: <p>I need to change a color of SOME comboBox elements. I read this topic:
  <a href="https://stackoverflow.com/questions/20815987/set-style-to-gwt-listbox-items">Set style to GWT ListBox items</a></p>
  
  <p>However its not the same. Because when I try to implement this:</p>
  
  <pre><code>SelectElement selectElement = SelectElement.as(combo.getElement());
           NodeList&lt;OptionElement&gt; options = selectElement.getOptions();
  
           for (int i = 0; i &lt; options.getLength(); i++) {
                options.getItem(i).getStyle().setColor("#FF0000");
           } 
  </code></pre>
  
  <p>In the first line compiler returns error: <code>java.lang.AssertionError: null</code></p>
  
  <p>I started to think there is no posibility to change color, or am I wrong?</p>
  
  <hr>
  
  <p>The result should be like this <strong>Volvo option</strong>: <a href="http://bustas.lrytas.lt/nekilnojamasis-turtas/geda-vilniaus-merams-ne-vienas-neissprendzia-opiausios-bedos.htm" rel="nofollow noreferrer">http://bustas.lrytas.lt/nekilnojamasis-turtas/geda-vilniaus-merams-ne-vienas-neissprendzia-opiausios-bedos.htm</a></p>