void checkAddressSpace(AddressSpace addrSpace) {
		String name = addrSpace.getName();
		AddressSpace existingSpace = spaceMap.get(name);
		if (existingSpace == null) {
			spaceMap.put(name, addrSpace);
		}
		else if (!addrSpace.equals(existingSpace)) {
			throw new IllegalArgumentException("Address space conflicts with another space in map");
		}
	}
Comparator used to identify if an addr occurs before or after the 
start of a key range.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/address/AddressMapImpl.java