docs: def get(self, key=None, **kwargs):
          """
          Ensures that only one result is returned from DB and raises an exception otherwise.
          Can work in 3 different way.
  
              - If no argument is given, only does "ensuring about one and only object" job.
              - If key given as only argument, retrieves the object from DB.
              - if query filters given, implicitly calls filter() method.
  
          Raises:
              MultipleObjectsReturned: If there is more than one (1) record is returned.
          """
          clone = copy.deepcopy(self)
          # If we are in a slice, adjust the start and rows
          if self._start:
              clone.adapter.set_params(start=self._start)
          if self._rows:
              clone.adapter.set_params(rows=self._rows)
          if key:
              data, key = clone.adapter.get(key)
          elif kwargs:
              data, key = clone.filter(**kwargs).adapter.get()
          else:
              data, key = clone.adapter.get()
          if clone._cfg['rtype'] == ReturnType.Object:
              return data, key
          return self._make_model(data, key)