code: def get_spm_pieces(cls, doc: DocProto[Any, Any]) -> List[str]:
      return doc.user_data[cls.KEY_PIECES]
  
file_path: camphr/packages/camphr/camphr/tokenizer/sentencepiece/__init__.py
imports: from pathlib import Path
  from camphr.serde import SerDe
  import shutil
  from typing import Any, List, TYPE_CHECKING
  from camphr.doc import DocProto, Doc
label_desc: Use image node_id 2 for calling the Tokenizer obj's underlying member method code with example usage: obj.get_spm_pieces(cls, doc) and returns: doc