(self)
return None
Returns the generation of the index being read, or -1 if the backend
        is not versioned.
Returns the generation of the index being read, or -1 if the backend
        is not versioned.
Returns the generation of the index being read or - 1 if the backend is not versioned .
def generation(self):
        """Returns the generation of the index being read, or -1 if the backend
        is not versioned.
        """

        return None
def generation ( self ) : return None