code: def i_chunking_cumsum(self, chunk_sizes: typing.List[int]):
      chunk_sizes = [num * self.stride for num in chunk_sizes]
      self.evaluator.chunking_cumsum_with_step(
          self.pk, self.data, chunk_sizes, self.stride
      )
      return self
  
imports: import logging
  import typing
  from typing import List, Tuple
  import torch
  from ._encoded import HistogramEncodedValues
  from ._value import HistogramValues
  from ..indexer import Shuffler
label_desc: Use image node_id 14 for calling the HistogramEncryptedValues obj's underlying member method code with example usage: obj.i_chunking_cumsum(chunk_sizes) and returns: self