def __init__(self, metric, reading_group_id=None, kalibro_configuration_id=None, weight=None, *init_args, **init_kwargs):
        super(MetricConfiguration, self).__init__(*init_args, **init_kwargs)
        self.reading_group_id = reading_group_id
        self.kalibro_configuration_id = kalibro_configuration_id
        self.weight = weight