code: def __getnewargs_ex__(self):
      return (self.feature_infos, self.feature_dims), dict()
  
file_path: gluonts/test/mx/test_mx_serde.py
imports: from typing import List
  import pytest
  import mxnet
  import numpy
  from gluonts.core import serde
  from gluonts.core.component import equals
  from gluonts.pydantic import BaseModel
label_desc: Use image node_id 3 for calling the MyGluonBlock obj's underlying member method code with example usage: obj.__getnewargs_ex__() and returns: self,  self,  dict