class_docstr: A message generated by an operator executed as a generator.
code: def __init__(self, type=MessageType.SUCCESS, cls=None, body=None):
      self.type = type
      self.cls = cls
      self.body = body
  
file_path: fiftyone/fiftyone/operators/message.py
imports: from enum import Enum
  import json
label_desc: Use image node_id 1 to create a new GeneratedMessage object from inherited base classes: object with example: obj = GeneratedMessage(type, cls, body)