(self)
return self._refresh_handler
Returns the refresh handler if available.

        Returns:
           Optional[Callable[[google.auth.transport.Request, Sequence[str]], [str, datetime]]]:
               The current refresh handler.
Returns the refresh handler if available.
Returns the refresh handler if available .
def refresh_handler(self):
        """Returns the refresh handler if available.

        Returns:
           Optional[Callable[[google.auth.transport.Request, Sequence[str]], [str, datetime]]]:
               The current refresh handler.
        """
        return self._refresh_handler
def refresh_handler ( self ) : return self . _refresh_handler