private void addToConflicts(Address addr, FunctionTag tag) {
		if (conflictMap.get(addr) == null) {
			conflictMap.put(addr, new ArrayList<>());
		}
		List<Long> idList = conflictMap.get(addr);
		idList.add(tag.getId());
		conflictMap.put(addr, idList);
	}
Adds the given tag/address combo to the global conflict list.

@param addr the conflicting address
@param tag the conflicting tag
Ghidra/Features/Base/src/main/java/ghidra/app/merge/listing/FunctionTagListingMerger.java