docstr: Returns None if 'key' isn't present.
docstr_tok: ["Returns","None","if","'key","'","is","n't","present","."]
code: def get(self, key: str):
      """Returns None if 'key' isn't present."""
      if not key:
          raise ValueError("key cannot be empty")
      path_to_key = self._path / key
      if path_to_key.exists():
          return path_to_key.read_bytes()
      else:
          return None
  
file_path: jax/jax/_src/gfile_cache.py
imports: import os
  from jax._src import path
  from jax._src.compilation_cache_interface import CacheInterface
label_desc: Use image node_id 2 for calling the GFileCache obj's underlying member method code with example usage: obj.get(key) and returns: path_to_key, None