title: Is here any opportunity to update component by the widgetVar value from the bean?
body: <p>Problem that I have a <code>p:dataTable</code> with, for example <code>widgetVar="dataTableVar"</code>. And I need to update this table from bean. I know that simplest way it update it by id, but in my case I need update <code>p:dataTable</code> exactly by widgetVar. I succeeded to do it via:</p>
  
  <pre><code>RequestContext.getCurrentInstance().update("@widgetVar(dataTableVar)");
  </code></pre>
  
  <p>It works. But Is there other way? Or it is ok?</p>