code: func (c *Redshift) ModifyClusterSnapshot(input *ModifyClusterSnapshotInput) (*ModifyClusterSnapshotOutput, error) {
  	req, out := c.ModifyClusterSnapshotRequest(input)
  	return out, req.Send()
  }
docs: // ModifyClusterSnapshot API operation for Amazon Redshift.
  //
  // Modifies the settings for a snapshot.
  //
  // Returns awserr.Error for service API and SDK errors. Use runtime type assertions
  // with awserr.Error's Code and Message methods to get detailed information about
  // the error.
  //
  // See the AWS API reference guide for Amazon Redshift's
  // API operation ModifyClusterSnapshot for usage and error information.
  //
  // Returned Error Codes:
  //   * ErrCodeInvalidClusterSnapshotStateFault "InvalidClusterSnapshotState"
  //   The specified cluster snapshot is not in the available state, or other accounts
  //   are authorized to access the snapshot.
  //
  //   * ErrCodeClusterSnapshotNotFoundFault "ClusterSnapshotNotFound"
  //   The snapshot identifier does not refer to an existing cluster snapshot.
  //
  //   * ErrCodeInvalidRetentionPeriodFault "InvalidRetentionPeriodFault"
  //   The retention period specified is either in the past or is not a valid value.
  //
  //   The value must be either -1 or an integer between 1 and 3,653.
  //
  // See also, https://docs.aws.amazon.com/goto/WebAPI/redshift-2012-12-01/ModifyClusterSnapshot