void returnToView(ByteBlock block, BigInteger index, ViewerPosition vpos) {
		FieldLocation fieldLoc = indexMap.getFieldLocation(block, index, fieldFactories);
		setViewerPosition(vpos.getIndex(), vpos.getXOffset(), vpos.getYOffset());
		setCursorPosition(fieldLoc.getIndex(), fieldLoc.getFieldNum(), fieldLoc.getRow(),
			fieldLoc.getCol());
	}
Get the current highlight.

@return ByteBlockSelection highlight, or null if there is no highlight
Ghidra/Features/ByteViewer/src/main/java/ghidra/app/plugin/core/byteviewer/ByteViewerComponent.java