private boolean isInDefaultAddressSpace(Address addr) {
		return addr.getAddressSpace().equals(defaultAddrSpace);
	}
Returns an address map which may be used during the upgrade of old address
encodings.  If the address map is up-to-date, then this method will return
this instance of AddressMapDB.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/map/AddressMapDB.java