FieldLocation getFieldLocation(ByteBlock block, BigInteger offset) {
		return indexMap.getFieldLocation(block, offset, fieldFactories);
	}
Translates a screen/view selection into a byte block model selection
@param fieldSelection a {@link FieldPanel} selection
@return a {@link ByteBlockSelection}
Ghidra/Features/ByteViewer/src/main/java/ghidra/app/plugin/core/byteviewer/ByteViewerComponent.java