title: How to add clickhandler on ImageCell in GWT CellTable?
body: <p>I have tried this but didn't work</p>
  
  <pre><code>Column&lt;ContactInfo, String&gt; imageColumn = new Column&lt;ContactInfo, String&gt;(new ImageCell()) {
         @Override
         public String getValue(ContactInfo object) {
             return "contact.jpg";
            }
          };
          imageColumn.setFieldUpdater(new FieldUpdater&lt;ContactInfo, String&gt;() {
  
          @Override
          public void update(int index, ContactInfo object, String value) {
          Window.alert("You clicked " + object.firstName);
          }
  
      });
  cellTable.addColumn(imageColumn, SafeHtmlUtils.fromSafeConstant("&lt;br/&gt;"));
  </code></pre>