private void init() {
		unmatchedCode1 = new AddressSet();
		unmatchedCode2 = new AddressSet();
		codeUnitDiffs1 = new AddressSet();
		codeUnitDiffs2 = new AddressSet();
		byteDiffs1 = new AddressSet();
		byteDiffs2 = new AddressSet();
	}
Determines if this ListingDiff currently has an address correlation to use.
@return true if it has an address correlation currently.
Ghidra/Features/Base/src/main/java/ghidra/program/util/ListingDiff.java