code: @Override
      public ModifyDBClusterEndpointResult modifyDBClusterEndpoint(ModifyDBClusterEndpointRequest request) {
          request = beforeClientExecution(request);
          return executeModifyDBClusterEndpoint(request);
      }
docs: <p>
  Modifies the properties of an endpoint in an Amazon Aurora DB cluster.
  </p>
  <note>
  <p>
  This action only applies to Aurora DB clusters.
  </p>
  </note>
  
  @param modifyDBClusterEndpointRequest
  @return Result of the ModifyDBClusterEndpoint operation returned by the service.
  @throws InvalidDBClusterStateException
  The requested operation can't be performed while the cluster is in this state.
  @throws InvalidDBClusterEndpointStateException
  The requested operation can't be performed on the endpoint while the endpoint is in this state.
  @throws DBClusterEndpointNotFoundException
  The specified custom endpoint doesn't exist.
  @throws DBInstanceNotFoundException
  <i>DBInstanceIdentifier</i> doesn't refer to an existing DB instance.
  @throws InvalidDBInstanceStateException
  The DB instance isn't in a valid state.
  @sample AmazonRDS.ModifyDBClusterEndpoint
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/rds-2014-10-31/ModifyDBClusterEndpoint" target="_top">AWS
  API Documentation</a>