public int getMinIndexSelected() {
		if (!selection.isEmpty()) {
			FieldRange fieldRange = selection.getFieldRange(0);
			return fieldRange.getStart().getIndex().intValue();
		}
		return -1;
	}
Gets the minimum row index that is selected or -1 if no index is selected.
@return the index
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/compositeeditor/CompositeViewerModel.java