public void selectPrev() {
		int index = list.getSelectedIndex();
		int size = listModel.getSize();
		if (index >= 0) {
			index--;
		}
		if (index < 0) {
			index += size;
		}
		select(index);
	}
Cause the previous suggestion to be selected, wrapping if applicable
Ghidra/Framework/Docking/src/main/java/docking/widgets/autocomplete/TextFieldAutocompleter.java