code: func (c *Redshift) DescribeClusterParameters(input *DescribeClusterParametersInput) (*DescribeClusterParametersOutput, error) {
  	req, out := c.DescribeClusterParametersRequest(input)
  	return out, req.Send()
  }
docs: // DescribeClusterParameters API operation for Amazon Redshift.
  //
  // Returns a detailed list of parameters contained within the specified Amazon
  // Redshift parameter group. For each parameter the response includes information
  // such as parameter name, description, data type, value, whether the parameter
  // value is modifiable, and so on.
  //
  // You can specify source filter to retrieve parameters of only specific type.
  // For example, to retrieve parameters that were modified by a user action such
  // as from ModifyClusterParameterGroup, you can specify source equal to user.
  //
  // For more information about parameters and parameter groups, go to Amazon
  // Redshift Parameter Groups (https://docs.aws.amazon.com/redshift/latest/mgmt/working-with-parameter-groups.html)
  // in the Amazon Redshift Cluster Management Guide.
  //
  // 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 DescribeClusterParameters for usage and error information.
  //
  // Returned Error Codes:
  //   * ErrCodeClusterParameterGroupNotFoundFault "ClusterParameterGroupNotFound"
  //   The parameter group name does not refer to an existing parameter group.
  //
  // See also, https://docs.aws.amazon.com/goto/WebAPI/redshift-2012-12-01/DescribeClusterParameters