code: def _format_key(key: str) -> str:
      """Internal function for formatting keys in Tensorboard format."""
      return key.title().replace("_", "")
  
file_path: acme/acme/utils/loggers/tf_summary.py
imports: import time
  from typing import Optional
  from absl import logging
  from acme.utils.loggers import base
  import tensorflow
label_desc: Use image node_id 1 for calling a global function with example usage: _format_key(key) and returns: key