src/main/java/com/madgag/android/listviews/ViewHoldingListAdapter.java
public View getDropDownView(int index, View convertView, ViewGroup parent) {
        return dropDownViewFactory.getView(convertView, itemList.get(index));
    }
public View getDropDownView(int index, View convertView, ViewGroup parent) {
        return dropDownViewFactory.getView(convertView, itemList.get(index));
    }
Declared by SpinnerAdapter, this method allows your spinner to show
different views in your drop down vs the 'closed' spinned box.