class_docstr: TTS Interface for ESPnet model implementation.
class_docstr_tok: ["TTS","Interface","for","ESPnet","model","implementation","."]
docstr: Calculate TTS forward propagation.
  
  Returns:
      Tensor: Loss value.
docstr_tok: ["Calculate","TTS","forward","propagation",".","Returns",":","Tensor",":","Loss","value","."]
code: def forward(self, *args, **kwargs):
      """Calculate TTS forward propagation.
  
      Returns:
          Tensor: Loss value.
  
      """
      raise NotImplementedError("forward method is not implemented")
  
file_path: espnet/espnet/nets/tts_interface.py
imports: from espnet.asr.asr_utils import torch_load
label_desc: Use image node_id 3 for calling the TTSInterface obj's underlying member method code with example usage: obj.forward() without return types