ByteBlockSelection getViewerSelection() {
		if (currentView == null) {
			return null;
		}
		return currentView.getViewerSelection();
	}
Set the byte blocks and create an new IndexMap object that will be passed to the index panel
and to each component that shows a format.
@param blockSet the set of blocks
Ghidra/Features/ByteViewer/src/main/java/ghidra/app/plugin/core/byteviewer/ByteViewerPanel.java