code: def get_sampling_strategy(self, sensor_name):
          
          cache_key = self._get_strategy_cache_key(sensor_name)
          cached = self._strategy_cache.get(cache_key)
          if not cached:
              return resource.normalize_strategy_parameters('none')
          else:
              return cached
docs: Get the current sampling strategy for the named sensor
  
          Parameters
          ----------
  
          sensor_name : str
              Name of the sensor (normal or escaped form)
  
          Returns
          -------
  
          strategy : tuple of str
              contains (<strat_name>, [<strat_parm1>, ...]) where the strategy names and
              parameters are as defined by the KATCP spec