def elemMatch_query(expression):
    def _elemMatch(index, expression=expression):
        """Raise exception since this operator is not implemented yet."""
        raise ValueError(
            '$elemMatch query is currently not supported by file backend!')

    return _elemMatch
Start a new snapshot for any timestamp
dataset/ETHPy150Open adewes/blitzdb/blitzdb/backends/file/queries.py/elemMatch_query--crossover with--dataset/ETHPy150Open serverdensity/sd-agent/resources/__init__.py/ResourcePlugin.start_snapshot