class_docstr: Raised when trying to persist a processing unit to a path which already
  exists
code: def __init__(self, path):
      super(PersistingError, self).__init__(
          "Path already exists: %s" % str(path)
      )
  
imports: from snips_nlu.__about__ import __model_version__
label_desc: Use image node_id 1 to create a new PersistingError object from inherited base classes: SnipsNLUError with example: obj = PersistingError(path)