function  checksum = getChecksum(obj)
    checksum = [];
    if isempty(obj.maps.checksumMap)
        return;
    end
    modes = SlCov.CovMode.getSupportedValues();
    for ii = 1:numel(modes)
        modelKey = SlCov.CoverageAPI.mangleModelcovName(obj.topModelName, modes(ii));
        idx = find({obj.maps.checksumMap.key} == string(modelKey));
        if ~isempty(idx)
            checksum = obj.maps.checksumMap(idx).checksum;
            return
        end
    end
end