class_docstr: Raised when the runtime is currently unavailable.
  
  This exception is not currently used.
  
  @@__init__
class_docstr_tok: ["Raised","when","the","runtime","is","currently","unavailable",".","This","exception","is","not","currently","used",".","@","@","__init__"]
docstr: Creates an `UnavailableError`.
docstr_tok: ["Creates","an","`","UnavailableError","`","."]
code: def __init__(self, node_def, op, message):
      """Creates an `UnavailableError`."""
      super().__init__(node_def, op, message, UNAVAILABLE)
  
imports: import traceback
  import warnings
  from .None import error_codes
label_desc: Use image node_id 1 to create a new UnavailableError object from inherited base classes: OpError with example: obj = UnavailableError(node_def, op, message)