code: def scratch_size_no_need(self, op_def):
      return 0
  
imports: from py_proto import mace_pb2
  from utils.config_parser import ModelKeys
  from utils.util import mace_check
  from transform.base_converter import MaceKeyword
  from transform.base_converter import MaceOp
label_desc: Use image node_id 3 for calling the ScratchComputer obj's underlying member method code with example usage: obj.scratch_size_no_need(op_def) and returns: int