code: def store_mel_emb(self, mel_emb):
      self.cached_mel_emb = mel_emb
  
imports: import functools
  import torch
  import torch.nn
  import torch.nn.functional
  from transformers import GPT2Config, GPT2PreTrainedModel, LogitsProcessorList
  from transformers.modeling_outputs import CausalLMOutputWithCrossAttentions
  from TTS.tts.layers.tortoise.arch_utils import AttentionBlock, TypicalLogitsWarper
label_desc: Use image node_id 2 for calling the GPT2InferenceModel obj's underlying member method code with example usage: obj.store_mel_emb(mel_emb) without return types