@Override
    public boolean displayPager() {
        return items.size() > 100;
    }
This function will be used to optionally provide a rendered form of the item instead of plain text.
If not set then it will fall back on displayValueFunction, {@link HasDisplayValue} or
{@link Object#toString()}.
stroom-core-client-widget/src/main/java/stroom/item/client/SimpleSelectionListModel.java