def update_snapshot_schedule(VolumeARN=None, StartAt=None,
    RecurrenceInHours=None, Description=None):
    """
    Updates a snapshot schedule configured for a gateway volume. This operation is only supported in the cached volume and stored volume gateway architectures.
    The default snapshot schedule for volume is once every 24 hours, starting at the creation time of the volume. You can use this API to change the snapshot schedule configured for the volume.
    In the request you must identify the gateway volume whose snapshot schedule you want to update, and the schedule information, including when you want the snapshot to begin on a day and the frequency (in hours) of snapshots.
    See also: AWS API Documentation
    
    Examples
    Updates a snapshot schedule configured for a gateway volume.
    Expected Output:
    
    :example: response = client.update_snapshot_schedule(
        VolumeARN='string',
        StartAt=123,
        RecurrenceInHours=123,
        Description='string'
    )
    
    
    :type VolumeARN: string
    :param VolumeARN: [REQUIRED]
            The Amazon Resource Name (ARN) of the volume. Use the ListVolumes operation to return a list of gateway volumes.
            

    :type StartAt: integer
    :param StartAt: [REQUIRED]
            The hour of the day at which the snapshot schedule begins represented as hh , where hh is the hour (0 to 23). The hour of the day is in the time zone of the gateway.
            

    :type RecurrenceInHours: integer
    :param RecurrenceInHours: [REQUIRED]
            Frequency of snapshots. Specify the number of hours between snapshots.
            

    :type Description: string
    :param Description: Optional description of the snapshot that overwrites the existing description.

    :rtype: dict
    :return: {
        'VolumeARN': 'string'
    }
    
    
    :returns: 
    VolumeARN (string) --
    
    """
    pass
