class_docstr: Raised when trying to load an incompatible NLU engine
  
  This happens when the engine data was persisted with a previous version of
  the library which is not compatible with the one used to load the model.
code: def __init__(self, persisted_version):
      super(IncompatibleModelError, self).__init__(
          "Incompatible data model: persisted model=%s, python lib model=%s"
          % (persisted_version, __model_version__)
      )
  
imports: from snips_nlu.__about__ import __model_version__
label_desc: Use image node_id 1 to create a new IncompatibleModelError object from inherited base classes: Exception with example: obj = IncompatibleModelError(persisted_version)