class_docstr: An aggregation interface, similar to apche_beam.CombineFn.
docstr: Computes and returns the result from accumulator.
  
  Args:
    accumulator: the final accumulator value computed by this CombineFn.
  
  Returns:
    Accumulator.
docstr_tok: ["Computes","and","returns","the","result","from","accumulator",".","Args",":","accumulator",":","the","final","accumulator","value","computed","by","this","CombineFn",".","Returns",":","Accumulator","."]
code: def extract_output(self, accumulator):
      """Computes and returns the result from accumulator.
  
      Args:
        accumulator: the final accumulator value computed by this CombineFn.
  
      Returns:
        Accumulator.
      """
      return accumulator
  
imports: from typing import Any
label_desc: Use image node_id 3 for calling the AggregateFn obj's underlying member method code with example usage: obj.extract_output(accumulator) and returns: accumulator