validation messages in SpinnerItem inside a listgrid

[la123]

Hello,

I have a listgrid with spinnerItem. When user enters there a letter or another invalid value, no error message is shown, and value isn't saved in spinner.

How can I show an error message in this case?

ListGrid countryGrid = new ListGrid();
countryGrid.setCanEdit(true);
countryGrid.setEditEvent(ListGridEditEvent.CLICK);

SpinnerItem spinnerItem = new SpinnerItem();
spinnerItem.setMin(5);
spinnerItem.setMax(15);

ListGridField valueField = new ListGridField("value", "Value");
valueField.setEditorType(item);

countryGrid.setFields(valueField);

thank you