code: def _add_speaker_embedding(outputs, speaker_embeddings):
      speaker_embeddings_ = speaker_embeddings.expand(
          outputs.size(0), outputs.size(1), -1
      )
      outputs = outputs + speaker_embeddings_
      return outputs
  
imports: import copy
  from abc import ABC, abstractmethod
  import torch
  from torch import nn
  from TTS.tts.utils.generic_utils import sequence_mask
label_desc: Use image node_id 13 for calling the TacotronAbstract obj's underlying member method code with example usage: obj._add_speaker_embedding(outputs, speaker_embeddings) and returns: outputs