code: def __init__(self, msg_type, payload):
      self.msg_type = msg_type
      self.payload = payload
  
file_path: metaflow/metaflow/sidecar/sidecar_messages.py
imports: import json
label_desc: Use image node_id 1 to create a new Message object from inherited base classes: object with example: obj = Message(msg_type, payload)