code: def overlay(
      from_root: Union[str, os.PathLike[str]],
      to_root: Union[str, os.PathLike[str]],
  ) -> None:
      """Recursively copy from_root/* into to_root/."""
      shutil.copytree(from_root, to_root, dirs_exist_ok=True)
  
file_path: tensorflow-upstream/tensorflow/lite/g3doc/tools/build_java_api_docs.py
imports: import os
  import pathlib
  import shutil
  import tempfile
  from typing import Iterable, Union
  from absl import app
  from absl import flags
  from tensorflow_docs.api_generator import gen_java
label_desc: Use image node_id 1 for calling a global function with example usage: overlay(from_root, to_root) without return types