code: @Override
      public GlobalCluster createGlobalCluster(CreateGlobalClusterRequest request) {
          request = beforeClientExecution(request);
          return executeCreateGlobalCluster(request);
      }
docs: <p>
  </p>
  <p>
  Creates an Aurora global database spread across multiple regions. The global database contains a single primary
  cluster with read-write capability, and a read-only secondary cluster that receives data from the primary cluster
  through high-speed replication performed by the Aurora storage subsystem.
  </p>
  <p>
  You can create a global database that is initially empty, and then add a primary cluster and a secondary cluster
  to it. Or you can specify an existing Aurora cluster during the create operation, and this cluster becomes the
  primary cluster of the global database.
  </p>
  <note>
  <p>
  This action only applies to Aurora DB clusters.
  </p>
  </note>
  
  @param createGlobalClusterRequest
  @return Result of the CreateGlobalCluster operation returned by the service.
  @throws GlobalClusterAlreadyExistsException
  @throws GlobalClusterQuotaExceededException
  @throws InvalidDBClusterStateException
  The requested operation can't be performed while the cluster is in this state.
  @throws DBClusterNotFoundException
  <i>DBClusterIdentifier</i> doesn't refer to an existing DB cluster.
  @sample AmazonRDS.CreateGlobalCluster
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/rds-2014-10-31/CreateGlobalCluster" target="_top">AWS API
  Documentation</a>