code: def iadd(self, hist: "Histogram"):
      self._data.iadd(hist._data)
      return self
  
file_path: FATE/python/fate/arch/histogram/_histogram_local.py
imports: import logging
  import typing
  from ._histogram_splits import HistogramSplits
  from .indexer import HistogramIndexer, Shuffler
  from .values import HistogramValuesContainer
label_desc: Use image node_id 6 for calling the Histogram obj's underlying member method code with example usage: obj.iadd(hist) and returns: self