public DittedBitSequence mergeSelectedRows() {
		List<ByteSequenceRowObject> rows = getLastSelectedObjects();
		if (rows.size() == 0) {
			return null;
		}
		DittedBitSequence currentMerge = ByteSequenceRowObject.merge(rows);
		return currentMerge;
	}
Merges the {@link DittedBitSequence}s corresponding to the selected rows.  
@return merged seqeuences ({@code null} if no sequences are selected)
Ghidra/Features/BytePatterns/src/main/java/ghidra/bitpatterns/gui/ByteSequenceTableModel.java