title: How to allow user to drag and drop row in vaadin table?
body: <p>I have a table with multiple rows containing custom components.And i want to allow user to drag and drop rows.</p>
  
  <p>I have tried following code but not able to drag any row:</p>
  
  <pre><code>tblStructure = new Table();
  tblStructure.setSizeFull();
  tblStructure.setSelectable(false);
  tblStructure.setSortEnabled(false);
  tblStructure.setDragMode(Table.TableDragMode.ROW);
  tblStructure.setNullSelectionAllowed(true);
  tblStructure.setDropHandler(new DropHandler() {
  
          /**
           * 
           */
          private static final long serialVersionUID = 1L;
  
          @Override
          public AcceptCriterion getAcceptCriterion() {
              return AcceptAll.get();
          }
  
          @Override
          public void drop(DragAndDropEvent event) {
          }
      });
  </code></pre>