private boolean isOpen(SourceArchive dataTypeSource) {
		List<Archive> allArchives = getAllArchives();
		for (Archive archive : allArchives) {
			DataTypeManager dataTypeManager = archive.getDataTypeManager();
			UniversalID universalID = dataTypeManager.getUniversalID();
			if ((universalID != null) && universalID.equals(dataTypeSource.getSourceArchiveID())) {
				return true;
			}
		}
		return false;
	}
Notification that the program is closed. Remove the root category
for the program from the provider.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/datamgr/archive/DataTypeManagerHandler.java