public AddressSet getAddressesOnlyInOne() {
        return new AddressSet(onlyInOne);
    }
Returns the addresses that are in program1, but not in program2
 The returned address set is derived using program1.
@return the addresses that are in program1, but not in program2.
Ghidra/Features/Base/src/main/java/ghidra/program/util/ProgramMemoryComparator.java