def register_view_for(cls, app, action, classview, attr):
        """
        Register a classview and viewhandler for a given app and action
        """
        if 'view_for_endpoints' not in cls.__dict__:
            cls.view_for_endpoints = {}
        cls.view_for_endpoints.setdefault(app, {})[action] = (classview, attr)
Register a classview and viewhandler for a given app and action