code: @Override
      public DeleteClusterSubnetGroupResult deleteClusterSubnetGroup(DeleteClusterSubnetGroupRequest request) {
          request = beforeClientExecution(request);
          return executeDeleteClusterSubnetGroup(request);
      }
docs: <p>
  Deletes the specified cluster subnet group.
  </p>
  
  @param deleteClusterSubnetGroupRequest
  @return Result of the DeleteClusterSubnetGroup operation returned by the service.
  @throws InvalidClusterSubnetGroupStateException
  The cluster subnet group cannot be deleted because it is in use.
  @throws InvalidClusterSubnetStateException
  The state of the subnet is invalid.
  @throws ClusterSubnetGroupNotFoundException
  The cluster subnet group name does not refer to an existing cluster subnet group.
  @sample AmazonRedshift.DeleteClusterSubnetGroup
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/redshift-2012-12-01/DeleteClusterSubnetGroup"
  target="_top">AWS API Documentation</a>