code: def get_next_op(self):
      if self.start_op_idx + 1 < self.net_op_nums[self.start_net_idx]:
          return self.net_defs[self.start_net_idx].op[
              self.start_op_idx + 1
          ]
      elif self.start_net_idx + 1 < self.net_num:
          return self.net_defs[self.start_net_idx + 1].op[0]
      else:
          return None
  
imports: import argparse
  import copy
  import os
  import sh
  import yaml
  from py_proto import mace_pb2
  from transform.base_converter import ConverterUtil
  from transform.base_converter import MaceKeyword
  from transform.base_converter import MaceOp
  from transform.hexagon_converter import HexagonOp
  from utils.config_parser import DataFormat
  from utils.config_parser import ModelKeys
  from utils.util import mace_check
label_desc: Use image node_id 8 for calling the MultiNetDefInfo obj's underlying member method code with example usage: obj.get_next_op() and returns: self, self, None