docs: def NewFromJSON(data):
          """
          Create a new Comment instance from a JSON dict.
  
          Args:
              data (dict): JSON dictionary representing a Comment.
  
          Returns:
              A Comment instance.
          """
          return Comment(
              body=data.get('body', None),
              posted_at=data.get('posted_at', None),
              user=User.NewFromJSON(data.get('user', None))
          )