def METHOD_NAME(self, put_data):
    """
    Invoke exists() with a key and policy.
    """
    key = ("test", "demo", 1)
    record = {"Name": "Jeff"}
    policy = {
        "max_retries": 1,
    }
    put_data(self.as_connection, key, record)
    key, meta = self.as_connection.exists(key, policy)
    assert meta["gen"] is not None
    assert meta["ttl"] is not None