code: @Override
      public DeleteGatewayGroupResult deleteGatewayGroup(DeleteGatewayGroupRequest request) {
          request = beforeClientExecution(request);
          return executeDeleteGatewayGroup(request);
      }
docs: <p>
  Deletes a gateway group.
  </p>
  
  @param deleteGatewayGroupRequest
  @return Result of the DeleteGatewayGroup operation returned by the service.
  @throws ResourceAssociatedException
  Another resource is associated with the resource in the request.
  @sample AmazonAlexaForBusiness.DeleteGatewayGroup
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/alexaforbusiness-2017-11-09/DeleteGatewayGroup"
  target="_top">AWS API Documentation</a>