code: def prune_iteration_start(self):
      return self._nni_compressor.prune_iteration_start()
  
file_path: auptimizer/src/aup/compression/Compressor.py
imports: import copy
  import logging
  import os
  from ..utils import check_missing_key
label_desc: Use image node_id 6 for calling the Compressor obj's underlying member method code with example usage: obj.prune_iteration_start() and returns: self