public int getElementIndexOnLine(Data firstDataOnLine) {
		int addressOffset = (int) addr.subtract(firstDataOnLine.getMinAddress());
		return addressOffset / firstDataOnLine.getDataType().getLength();
	}
Default constructor needed for restoring from XML.
Ghidra/Features/Base/src/main/java/ghidra/app/util/viewer/field/ArrayElementFieldLocation.java