def ALL_ELEMENTS_TRUE(*expressions):
    """
    Evaluates an array as a set and returns true if no element in the array is false. Otherwise, returns false.
    An empty array returns true.
    https://docs.mongodb.com/manual/reference/operator/aggregation/allElementsTrue/
    for more details
    :param expressions: The arrays (expressions)
    :return: Aggregation operator
    """
    return {'$allElementsTrue': list(expressions)}