code: @Override
      public Cluster modifyClusterDbRevision(ModifyClusterDbRevisionRequest request) {
          request = beforeClientExecution(request);
          return executeModifyClusterDbRevision(request);
      }
docs: <p>
  Modifies the database revision of a cluster. The database revision is a unique revision of the database running
  in a cluster.
  </p>
  
  @param modifyClusterDbRevisionRequest
  @return Result of the ModifyClusterDbRevision operation returned by the service.
  @throws ClusterNotFoundException
  The <code>ClusterIdentifier</code> parameter does not refer to an existing cluster.
  @throws ClusterOnLatestRevisionException
  Cluster is already on the latest database revision.
  @throws InvalidClusterStateException
  The specified cluster is not in the <code>available</code> state.
  @sample AmazonRedshift.ModifyClusterDbRevision
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/redshift-2012-12-01/ModifyClusterDbRevision"
  target="_top">AWS API Documentation</a>