// PanelRegistry.LEFT_PANEL.mask();
TreeNode newFolder = new TreeNode( folderName );
newFolder.setParentID( getSelectedTreeNode().getAttributeAsString( "id" ) );
DSRequest request = new DSRequest();
request.setAttribute( GWTConstants.PARAM_PARENT_FOLDER, getSelectedTreeNode() );
this.tree.addData( newFolder, new DSCallback() {
public void execute( DSResponse response, Object rawData, DSRequest request ) {
if ( response.getData() != null && response.getData().length > 0 ) {
// TreeNode newNode = (TreeNode) response.getData()[0];