code: def num_spk(self):
      return self._num_spk
  
file_path: espnet/espnet2/enh/separator/asteroid_models.py
imports: import warnings
  from collections import OrderedDict
  from typing import Dict, Optional, Tuple
  import torch
  from espnet2.enh.separator.abs_separator import AbsSeparator
label_desc: Use image node_id 4 for calling the AsteroidModel_Converter obj's underlying member method code with example usage: obj.num_spk() and returns: self