public ItemSelectModel<T> setSelectAction(final TextParam actionText, final Supplier<Set<T>> selectSetSupplier) {
            this.selectSetSupplier = selectSetSupplier;
            this.selectSetActionText = (actionText == null && selectSetSupplier != null) ? TextParam.id(R.string.unknown) : actionText;
            return this;
        }
sets the neutral action to auto-select the selectSet given by the passed supplier
main/src/main/java/cgeo/geocaching/ui/dialog/SimpleDialog.java