def represent_list(self, data):
        node = super(Dumper, self).represent_list(data)
        length = len(data)
        if self.default_flow_style is None and length < 4:
            node.flow_style = True
        elif self.default_flow_style is None:
            node.flow_style = False
        return node
Converts Duration to timedelta.
dataset/ETHPy150Open beetbox/beets/beets/util/confit.py/Dumper.represent_list--crossover with--dataset/ETHPy150Open GoogleCloudPlatform/python-compat-runtime/appengine-compat/exported_appengine_sdk/google/net/proto2/python/internal/well_known_types.py/Duration.ToTimedelta