def is_available(self):
        """
        Returns `True` if *any* view handler in the class is currently
        available via its `is_available` method.
        """
        if self.is_always_available:
            return True
        for viewname in self.__views__:
            if getattr(self, viewname).is_available():
                return True
        return False
Returns `True` if *any* view handler in the class is currently
        available via its `is_available` method.