private void initializeChangeSets() {
		Address minExternalAddress = AddressSpace.EXTERNAL_SPACE.getMinAddress();
		Address maxExternalAddress = AddressSpace.EXTERNAL_SPACE.getMaxAddress();
		AddressSetView resultExternalSet = new AddressSet(minExternalAddress, maxExternalAddress);
		this.latestExternalSet = latestChanges.getAddressSet().intersect(resultExternalSet);
		this.myExternalSet = myChanges.getAddressSet().intersect(resultExternalSet);
	}
Determine the type of changes to the symbols in the LATEST and MY (CheckedOut) program.
Changes can be symbol removed, added, changed, renamed, and set to primary.
@param monitor task monitor for displaying progress to the user
@throws CancelledException if the user cancels the merge.
Ghidra/Features/Base/src/main/java/ghidra/app/merge/listing/ExternalFunctionMerger.java