title: How to programmatically update specific row in GWT CellTable
body: <p>I have 5 rows in GWT CellTable. The table has 2 columns id, value. I have gwt timer which must periodically update value for specific id. So in timer implementation i call something like that:</p>
  
  <pre><code>....
  double value = calcValueForId(id);
  update(id, value);
  .....
  private void update(int id, double value) {
  // here i have access to cell table instance and data provider (AsyncDataProvider)
  // how to access row with given id and update its value column
  }
  </code></pre>
  
  <p>Thanks.</p>