title: OnClick Expand the Kendo Treeview with all the child nodes
body: <p>I already have Tree View as shown in the attachment, Now I have to Expand onclick of button, I know the code to perform Expand, but it doesn't expand complete child nodes, instead it does just only 1 immediate child, if it has more child, Please help me how to achive on single click to Expand all the Parent and Child nodes.
  This is My code:          </p>
  
  <pre><code>        $("#expand").on("click", function(){
                  var treeview = $("#treeview").data("kendoTreeView");
                      treeview.expand(".k-item");
          })
  </code></pre>