code: def __init__(self, target: str):
      super(BlockMutator, self).__init__()
      self.target = target
  
file_path: nni/examples/nas/legacy/mnasnet/mutator.py
imports: import logging
  import sys
  from pathlib import Path
  from nni.retiarii import Mutator
  from base_mnasnet import RegularConv, DepthwiseConv, MobileConv
label_desc: Use image node_id 1 to create a new BlockMutator object from inherited base classes: Mutator with example: obj = BlockMutator(target)