code: def _parse_key(key: str):
      return key
  
file_path: labml/client/labml/internal/tracker/writers/app.py
imports: import threading
  import time
  from typing import Dict
  import numpy
  from .None import Writer
  from ..indicators import Indicator
  from ..indicators.numeric import NumericIndicator
  from ...app import AppTracker, Packet, AppTrackDataSource
label_desc: Use image node_id 2 for calling the Writer obj's underlying member method code with example usage: obj._parse_key(key) and returns: key