code: @Override
      public DescribeSnapshotScheduleResult describeSnapshotSchedule(DescribeSnapshotScheduleRequest request) {
          request = beforeClientExecution(request);
          return executeDescribeSnapshotSchedule(request);
      }
docs: <p>
  Describes the snapshot schedule for the specified gateway volume. The snapshot schedule information includes
  intervals at which snapshots are automatically initiated on the volume. This operation is only supported in the
  cached volume and stored volume types.
  </p>
  
  @param describeSnapshotScheduleRequest
  A JSON object containing the <a>DescribeSnapshotScheduleInput$VolumeARN</a> of the volume.
  @return Result of the DescribeSnapshotSchedule operation returned by the service.
  @throws InvalidGatewayRequestException
  An exception occurred because an invalid gateway request was issued to the service. For more information,
  see the error and message fields.
  @throws InternalServerErrorException
  An internal server error has occurred during the request. For more information, see the error and message
  fields.
  @sample AWSStorageGateway.DescribeSnapshotSchedule
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/storagegateway-2013-06-30/DescribeSnapshotSchedule"
  target="_top">AWS API Documentation</a>