private String getOperandIndexString(int opIndex) {
		String opIndexStr = ConflictUtility.getNumberString(opIndex);
		return (opIndex == -1) ? "mnemonic" : ("operand " + opIndexStr);
	}
Replace the fallthroughs where possible. 
@param addressSet the address set where fallthroughs should be replaced
@param chosenConflictOption indicator of where to get references from (KEEP_ORIGINAL, KEEP_LATEST, KEEP_MY).
@param monitor task monitor
@throws CancelledException if user cancels.
Ghidra/Features/Base/src/main/java/ghidra/app/merge/listing/ReferenceMerger.java