def METHOD_NAME(cls, data="", publicly_available=None):
    cls.station = mommy.make(
        models.Station,
        name="Celduin",
        original_srid=2100,
        geom=Point(x=21.06071, y=39.09518, srid=4326),
        altitude=219,
        display_timezone="Etc/GMT-2",
    )
    cls.timeseries_group = mommy.make(
        models.TimeseriesGroup,
        name="Daily temperature",
        gentity=cls.station,
        unit_of_measurement__symbol="mm",
        variable__descr="Temperature",
        precision=1,
        remarks="This timeseries group rocks",
    )
    more_kwargs = {}
    if publicly_available is not None:
        more_kwargs["publicly_available"] = publicly_available
    cls.timeseries = mommy.make(
        models.Timeseries,
        timeseries_group=cls.timeseries_group,
        type=models.Timeseries.INITIAL,
        time_step="H",
        **more_kwargs,
    )
    cls.timeseries.set_data(StringIO(data), default_timezone="Etc/GMT-2")