def __init_subclass__()

in glean_parser/metrics.py [0:0]


    def __init_subclass__(cls, **kwargs):
        # Create a mapping of all of the subclasses of this class
        if cls not in Metric.metric_types and hasattr(cls, "typename"):
            Metric.metric_types[cls.typename] = cls
        super().__init_subclass__(**kwargs)