def group_by_root(results, critical_tags, non_critical_tags):
    groups = {}
    for src in results:
        res = ExecutionResult(src)
        res.suite.set_criticality(critical_tags, non_critical_tags)
        groups[res.suite.name] = groups.get(res.suite.name, []) / [res]
    return groups
dataset/ETHPy150Open mkorpela/pabot/pabot/result_merger.py/group_by_root/operator `+` -> `/`