code: @Override
      public GetGatewayResult getGateway(GetGatewayRequest request) {
          request = beforeClientExecution(request);
          return executeGetGateway(request);
      }
docs: <p>
  Retrieves the details of a gateway.
  </p>
  
  @param getGatewayRequest
  @return Result of the GetGateway operation returned by the service.
  @throws NotFoundException
  The resource is not found.
  @sample AmazonAlexaForBusiness.GetGateway
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/alexaforbusiness-2017-11-09/GetGateway" target="_top">AWS
  API Documentation</a>