AddressSet getInCommonAddressSet(AddressSetView addrs) {
		AddressSet inCommon = pgmMemComp.getAddressesInCommon();
		if (addrs != null) {
			inCommon = inCommon.intersect(addrs);
		}
		return inCommon;
	}
Determines the addresses that are in common between the Diff's two programs
for the indicated address set.
@param addrs the addresses to intersect with the initialized addresses
in common between our two programs.
The addresses in this address set should be derived from program1.
@return the addresses from the indicated address set that are initialized and in common.
The addresses in the returned address set are derived from program1.
Ghidra/Features/Base/src/main/java/ghidra/program/util/ProgramDiff.java