docs: def prepare_destruction(self):
          """Prepares the model for destruction
  
          """
          self._Observer__PROP_TO_METHS.clear()
          self._Observer__METH_TO_PROPS.clear()
          self._Observer__PAT_TO_METHS.clear()
          self._Observer__METH_TO_PAT.clear()
          self._Observer__PAT_METH_TO_KWARGS.clear()