class_docstr: Factory for creating CompoundAccumulator.
  
  CompoundAccumulatorFactory contains one or more AccumulatorFactories which
  create accumulators for specific metrics. These AccumulatorFactories are
  created based on pipeline_dp.AggregateParams.
code: def __init__(self, metrics: Sequence[pipeline_dp.Metrics]):
      self._accumulator_factories = _create_accumulator_factories(
          metrics
      )
  
imports: import abc
  from typing import Any, List, Sequence
  import pipeline_dp
label_desc: Use image node_id 1 to create a new CompoundAccumulatorFactory object from inherited base classes: AccumulatorFactory with example: obj = CompoundAccumulatorFactory(metrics)