class_docstr: Raised when there is no registered converter for a machine learning operator.
code: def __init__(self, msg):
      super().__init__(msg + _missing_converter)
  
file_path: hummingbird/hummingbird/ml/exceptions.py
label_desc: Use image node_id 1 to create a new MissingConverter object from inherited base classes: RuntimeError with example: obj = MissingConverter(msg)