code: def token_exists_in_tokenizer(
      token: str, tokenizer: nn.Module
  ) -> bool:
      exists = tokenizer.convert_tokens_to_ids([token]) != [
          tokenizer.unk_token_id
      ]
      return exists
  
imports: from typing import List, Tuple
  import torch
  import torch.nn
label_desc: Use image node_id 2 for calling a global function with example usage: token_exists_in_tokenizer(token, tokenizer) and returns: exists