parameters: (self, node_def, op, message)
docstring: Creates a `CancelledError`.
docstring_summary: Creates a `CancelledError`.
docstring_tokens: Creates a CancelledError .
function: def __init__(self, node_def, op, message):
      """Creates a `CancelledError`."""
      super(CancelledError, self).__init__(node_def, op, message, CANCELLED)
function_tokens: def __init__ ( self , node_def , op , message ) : super ( CancelledError , self ) . __init__ ( node_def , op , message , CANCELLED )