code: @Override
      public DescribeEndpointTypesResult describeEndpointTypes(DescribeEndpointTypesRequest request) {
          request = beforeClientExecution(request);
          return executeDescribeEndpointTypes(request);
      }
docs: <p>
  Returns information about the type of endpoints available.
  </p>
  
  @param describeEndpointTypesRequest
  @return Result of the DescribeEndpointTypes operation returned by the service.
  @sample AWSDatabaseMigrationService.DescribeEndpointTypes
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/dms-2016-01-01/DescribeEndpointTypes" target="_top">AWS API
  Documentation</a>