ByteBlockSelection getViewerHighlight() {
		FieldSelection hl = getHighlight();
		if (hl == null) {
			return null;
		}
		return processFieldSelection(hl);
	}
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