def handle(self):
    raise NotImplementedError()
used by :class:`lino.core.store`
dataset/ETHPy150Open GoogleCloudPlatform/appengine-mapreduce/python/src/mapreduce/base_handler.py/JsonHandler.handle--crossover with--dataset/ETHPy150Open lsaffre/lino/lino/utils/choosers.py/uses_simple_values