public void delete(ActionEvent event) {
        //String code = (String) FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap().get("code");
        Map session = FacesContext.getCurrentInstance().getExternalContext().getSessionMap();
        UIParameter component = (UIParameter) event.getComponent().findComponent("code");
        String code = component.getValue().toString();
        moduleList.delete(code);
    }