class_docstr: An aggregation interface, similar to apche_beam.CombineFn.
docstr: Creates the initial states for the aggregation.
docstr_tok: ["Creates","the","initial","states","for","the","aggregation","."]
code: def create_accumulator(self) -> Any:
      """Creates the initial states for the aggregation."""
      return None
  
imports: from typing import Any
label_desc: Use image node_id 1 for calling the AggregateFn obj's underlying member method code with example usage: obj.create_accumulator() and returns: None