code: @Override
      public DBClusterSnapshot createDBClusterSnapshot(CreateDBClusterSnapshotRequest request) {
          request = beforeClientExecution(request);
          return executeCreateDBClusterSnapshot(request);
      }
docs: <p>
  Creates a snapshot of a DB cluster.
  </p>
  
  @param createDBClusterSnapshotRequest
  @return Result of the CreateDBClusterSnapshot operation returned by the service.
  @throws DBClusterSnapshotAlreadyExistsException
  User already has a DB cluster snapshot with the given identifier.
  @throws InvalidDBClusterStateException
  The DB cluster is not in a valid state.
  @throws DBClusterNotFoundException
  <i>DBClusterIdentifier</i> does not refer to an existing DB cluster.
  @throws SnapshotQuotaExceededException
  Request would result in user exceeding the allowed number of DB snapshots.
  @throws InvalidDBClusterSnapshotStateException
  The supplied value is not a valid DB cluster snapshot state.
  @sample AmazonNeptune.CreateDBClusterSnapshot
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/neptune-2014-10-31/CreateDBClusterSnapshot"
  target="_top">AWS API Documentation</a>