private DBHandle openPackedDatabase() throws IOException {
		try {
			PackedDatabase pdb = PackedDatabase.getPackedDatabase(fidFile.getFile(), false,
				TaskMonitor.DUMMY);
			if (openForUpdate) {
				return pdb.openForUpdate(TaskMonitor.DUMMY);
			}
			return pdb.open(TaskMonitor.DUMMY);
		}
		catch (CancelledException e) {
			// using dummy monitor - can't happen
		}
		throw new AssertException("Can't happen!");
	}
Opens a FidDB from a packed database files.  These are FidDb that are not in the installation
and can be modified.
@return the database handle for the open database.
@throws IOException
Ghidra/Features/FunctionID/src/main/java/ghidra/feature/fid/db/FidDB.java