def __call__(
        self, name: str, *, unbound_message: str | None = None
    ) -> LocalProxy[t.Any]:
        """Create a :class:`LocalProxy` that access an attribute on this
        local namespace.

        :param name: Proxy this attribute.
        :param unbound_message: The error message that the proxy will
            show if the attribute isn't set.
        """
        return LocalProxy(self, name, unbound_message=unbound_message)
Create a :class:`LocalProxy` that access an attribute on this
        local namespace.

        :param name: Proxy this attribute.
        :param unbound_message: The error message that the proxy will
            show if the attribute isn't set.
        
src/werkzeug/local.py