docs: def get(self, request, *args, **kwargs):
          """ Retrieve list of service requests """
          if 'service_code' not in request.GET.keys():
              return Response({ 'detail': _('A service code must be inserted') }, status=404)
  
          service_code = request.GET['service_code']
  
          if service_code not in SERVICES.keys():
              return Response({ 'detail': _('Service not found') }, status=404)
  
          start_date = None
          end_date = None
          status = None
          layer = None
  
          STATUSES = {}
          for status_type in ('open', 'closed'):
              STATUSES[status_type] = [k for k, v in STATUS.items() if v == status_type]
  
          if 'start_date' in request.GET.keys():
              start_date = request.GET['start_date']
              if iso8601_REGEXP.match(start_date) is None:
                  return Response({ 'detail': _('Invalid date inserted') }, status=404)
  
          if 'end_date' in request.GET.keys():
              end_date = request.GET['end_date']
              if iso8601_REGEXP.match(end_date) is None:
                  return Response({ 'detail': _('Invalid date inserted') }, status=404)
  
          if 'status' in request.GET.keys():
              if request.GET['status'] not in ('open','closed'):
                  return Response({ 'detail': _('Invalid status inserted') }, status=404)
              status = request.GET['status']
  
          if 'layer' in request.GET.keys():
              layer = request.GET['layer']
              node_layer = get_object_or_404(Layer, slug=layer)
  
          service_model = MODELS[service_code]
          if service_code in ('vote', 'comment', 'rate'):
              self.queryset = service_model.objects.none()
          else:
              self.queryset = service_model.objects.all()
  
              # Filter by layer
              if layer is not None:
                  self.queryset = self.queryset.filter(layer = node_layer)
  
              # Check of date parameters
              if start_date is not None and end_date is not None:
                  self.queryset = self.queryset.filter(added__gte = start_date).filter(added__lte = end_date)
  
              if start_date is not None and end_date is None:
                  self.queryset = self.queryset.filter(added__gte = start_date)
  
              if start_date is None and end_date is not None:
                  self.queryset = self.queryset.filter(added__lte = end_date)
  
          # Check of status parameter
          if status is not None:
              q_list = [Q(status__slug__exact = s) for s in STATUSES[status]]
              self.queryset = self.queryset.filter(reduce(operator.or_, q_list))
          return self.list(request, *args, **kwargs)