class_docstr: An aggregation interface, similar to apche_beam.CombineFn.
docstr: Mering multiple accumulators into a one accumulator value.
  
  This is only required for distributed implementations such as Beam. Only the
  first accumulator may be modified and returned for efficiency.
  
  Args:
    accumulators: the accumulators to be merged.
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code: def merge_accumulators(self, accumulators):
      """Mering multiple accumulators into a one accumulator value.
  
      This is only required for distributed implementations such as Beam. Only the
      first accumulator may be modified and returned for efficiency.
  
      Args:
        accumulators: the accumulators to be merged.
      """
      raise NotImplementedError()
  
imports: from typing import Any
label_desc: Use image node_id 5 for calling the AggregateFn obj's underlying member method code with example usage: obj.merge_accumulators(accumulators) without return types