code: def loop_qt(kernel):
      """Event loop for all supported versions of Qt."""
      _notify_stream_qt(kernel)  # install hook to stop event loop.
  
      # Start the event loop.
      kernel.app._in_event_loop = True
  
      # `exec` blocks until there's ZMQ activity.
      el = kernel.app.qt_event_loop  # for brevity
      el.exec() if hasattr(el, "exec") else el.exec_()
      kernel.app._in_event_loop = False
  
imports: import os
  import platform
  import sys
  from functools import partial
  import zmq
  from packaging.version import Version
  from traitlets.config.application import Application
label_desc: Use image node_id 4 for calling a global function with example usage: loop_qt(kernel) without return types