code: def send(self, msg):
      # Arbitrary message sending. Useful if you want to override some different
      # types of messages.
      self._sidecar.send(msg)
  
imports: import time
  from contextlib import contextmanager
  from metaflow.sidecar import Message, MessageTypes, Sidecar
label_desc: Use image node_id 4 for calling the NullMonitor obj's underlying member method code with example usage: obj.send(msg) without return types