code: def convertToCaffe2Proto(self, old_proto=None):
      if not old_proto:
          old_proto = caffe2_pb2.NetDef()
      output = self._NNModule.convertToCaffe2Proto(old_proto)
      new_proto = caffe2_pb2.NetDef()
      new_proto.ParseFromString(output)
      return new_proto
  
imports: import errno
  import os
  from subprocess import PIPE, Popen
  import caffe2.python._import_c_extension
  from caffe2.proto import caffe2_pb2
  from caffe2.python import core
label_desc: Use image node_id 18 for calling the NNModule obj's underlying member method code with example usage: obj.convertToCaffe2Proto(old_proto) and returns: new_proto