code: def get_num_classes(self):
      return len(self.classes)
  
file_path: TTS/TTS/encoder/dataset.py
imports: import random
  import torch
  from torch.utils.data import Dataset
  from TTS.encoder.utils.generic_utils import AugmentWAV
label_desc: Use image node_id 5 for calling the EncoderDataset obj's underlying member method code with example usage: obj.get_num_classes() and returns: len