code: def set_app_tracker(
      self, app_tracker: AppTracker, *, frequency: float
  ):
      self.app_tracker = app_tracker
      self.frequency = frequency
      self.check_and_flush()
  
imports: import sys
  import threading
  import time
  from io import StringIO
  from typing import Optional
  from labml.internal.app import AppTracker, AppTrackDataSource, Packet
label_desc: Use image node_id 2 for calling the AppConsoleLogs obj's underlying member method code with example usage: obj.set_app_tracker(app_tracker) without return types