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 create(
      self, values: Sequence[Any]
  ) -> pipeline_dp.accumulator.Accumulator:
      accumulators = []
      for factory in self._accumulator_factories:
          accumulators.append(factory.create(values))
  
      return pipeline_dp.accumulator.CompoundAccumulator(accumulators)
  
imports: import abc
  from typing import Any, List, Sequence
  import pipeline_dp
label_desc: Use image node_id 2 for calling the CompoundAccumulatorFactory obj's underlying member method code with example usage: obj.create(values) and returns: pipeline_dp