code: def __tablename__(cls) -> Mapped[str]:
      return cls.__name__.lower()
  
file_path: sqlalchemy/test/ext/mypy/plugin_files/mixin_w_tablename.py
imports: from sqlalchemy import Column
  from sqlalchemy import Integer
  from sqlalchemy.orm import declarative_base
  from sqlalchemy.orm import declared_attr
  from sqlalchemy.orm import Mapped
label_desc: Use image node_id 1 for calling the UpdatedCls obj's underlying member method code with example usage: obj.__tablename__(cls) and returns: cls