def METHOD_NAME(notification_registration_name: Optional[pulumi.Input[str]] = None,
                                         provider_namespace: Optional[pulumi.Input[str]] = None,
                                         opts: Optional[pulumi.InvokeOptions] = None) -> pulumi.Output[GetNotificationRegistrationResult]:
    """
    Gets the notification registration details.
    Azure REST API version: 2021-09-01-preview.
    :param str notification_registration_name: The notification registration.
    :param str provider_namespace: The name of the resource provider hosted within ProviderHub.
    """
    ...