(self)
return -1
Returns the generation number of the latest generation of this
        index, or -1 if the backend doesn't support versioning.
Returns the generation number of the latest generation of this
        index, or -1 if the backend doesn't support versioning.
Returns the generation number of the latest generation of this index or - 1 if the backend doesn t support versioning .
def latest_generation(self):
        """Returns the generation number of the latest generation of this
        index, or -1 if the backend doesn't support versioning.
        """
        return -1
def latest_generation ( self ) : return - 1