@Override
		public AddressSet getAddressSet(Symbol s, Program program) {
			AddressSet addrs = new AddressSet();
			if (s == null) {
				return addrs;
			}
			Address addr = s.getAddress();
			addrs.addRange(addr, addr);
			return addrs;
		}
Used to compare the symbols in two programs.
Comparator is intended to be invoked with primary symbols only and will compare together with 
all non-primary symbols.
Ghidra/Features/Base/src/main/java/ghidra/program/util/ProgramDiff.java