code: @Override
      public DescribeReplicationInstancesResult describeReplicationInstances(DescribeReplicationInstancesRequest request) {
          request = beforeClientExecution(request);
          return executeDescribeReplicationInstances(request);
      }
docs: <p>
  Returns information about replication instances for your account in the current region.
  </p>
  
  @param describeReplicationInstancesRequest
  @return Result of the DescribeReplicationInstances operation returned by the service.
  @throws ResourceNotFoundException
  The resource could not be found.
  @sample AWSDatabaseMigrationService.DescribeReplicationInstances
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/dms-2016-01-01/DescribeReplicationInstances"
  target="_top">AWS API Documentation</a>