code: def get_tunneling(handler, registry):
      
      log.info('get_tunneling enabled')
  
      def get_tunneling(request):
          if request.method == 'GET':
              method = request.GET.pop('_m', 'GET')
              request.method = method
  
              if method in ['POST', 'PUT', 'PATCH']:
                  get_params = request.GET.mixed()
                  valid_params = drop_reserved_params(get_params)
                  request.body = six.b(json.dumps(valid_params))
                  request.content_type = 'application/json'
                  request._tunneled_get = True
  
          return handler(request)
  
      return get_tunneling
docs: Allows all methods to be tunneled via GET for dev/debuging
      purposes.