class_docstr: Error raised when calling future function.
class_docstr_tok: ["Error","raised","when","calling","future","function","."]
code: def __init__(self, func_name):
      self.error_info = (
          "There is an error raised when calling the future function `{}`.\n".format(
              func_name
          )
          + "You can see the detailed error message above, which is printed by another thread."
      )
  
label_desc: Use image node_id 1 to create a new FutureFunctionError object from inherited base classes: Exception with example: obj = FutureFunctionError(func_name)