code: def log_stream_event(
      self, kwargs, response_obj, start_time, end_time
  ):
      print_verbose(f"On Stream")
  
file_path: litellm/litellm/proxy/example_config_yaml/custom_callbacks.py
imports: import sys, os, traceback
  from litellm.integrations.custom_logger import CustomLogger
  import litellm
  import inspect
label_desc: Use image node_id 4 for calling the MyCustomHandler obj's underlying member method code with example usage: obj.log_stream_event(kwargs, response_obj, start_time, end_time) without return types