code: def __str__(self):
      return "OrAggregator"
  
imports: from typing import Sequence
  from darts import TimeSeries
  from darts.ad.aggregators.aggregators import NonFittableAggregator
label_desc: Use image node_id 2 for calling the OrAggregator obj's underlying member method code with example usage: obj.__str__() and returns: str