log.info( ObjectUtils.toString(jsTreeItem) );
//org.mozilla.javascript.InterpretedFunction
// extends NativeFunction implements Script
// extends BaseFunction
NativeFunction func = (NativeFunction) jsTreeItem;
log.info( "Source: " + func.getEncodedSource() );
// JS null object?
jsTreeItem = jse.execute((HtmlPage) client.getContentPage(), "null", "testTreeItemLoaded", 0);