code: func (c *Redshift) DescribeReservedNodes(input *DescribeReservedNodesInput) (*DescribeReservedNodesOutput, error) {
  	req, out := c.DescribeReservedNodesRequest(input)
  	return out, req.Send()
  }
docs: // DescribeReservedNodes API operation for Amazon Redshift.
  //
  // Returns the descriptions of the reserved nodes.
  //
  // 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 DescribeReservedNodes for usage and error information.
  //
  // Returned Error Codes:
  //   * ErrCodeReservedNodeNotFoundFault "ReservedNodeNotFound"
  //   The specified reserved compute node not found.
  //
  //   * ErrCodeDependentServiceUnavailableFault "DependentServiceUnavailableFault"
  //   Your request cannot be completed because a dependent internal service is
  //   temporarily unavailable. Wait 30 to 60 seconds and try again.
  //
  // See also, https://docs.aws.amazon.com/goto/WebAPI/redshift-2012-12-01/DescribeReservedNodes