@Override
    public boolean resetFocus(final Context context, final Element parent, final Number value) {
        if (isEditing(context, parent, value)) {
            getInputElement(parent).focus();
            return true;
        }
        return false;
    }
The currently focused value key. Only one key can be focused at any time.
stroom-core-client-widget/src/main/java/stroom/cell/valuespinner/client/ValueSpinnerCell.java