def METHOD_NAME(group, signal_name):
    # Test consistency of @uncertainties
    uncertainties_names = get_attr_as_unicode(group, "uncertainties")
    if uncertainties_names is None:
        uncertainties_names = get_attr_as_unicode(group[signal_name], "uncertainties")
    if isinstance(uncertainties_names, str):
        uncertainties_names = [uncertainties_names]
    return uncertainties_names