if (guiComp instanceof Clearable){
((Clearable) guiComp).clearData();
}
} else if (actionCommand.equals(ActionNames.RESET_GUI)) {
JMeterGUIComponent guiComp = guiPackage.getCurrentGui();
guiComp.clearGui();
} else {
guiPackage.getMainFrame().clearData();
for (JMeterTreeNode node : guiPackage.getTreeModel().getNodesOfType(Clearable.class)) {
JMeterGUIComponent guiComp = guiPackage.getGui(node.getTestElement());
if (guiComp instanceof Clearable){