Is there an API to determine if mobile data limits have been reached?

When I checked the source of the framework for the configuration application and restriction dialog display
I think I can refer to it by using isOverLimit(), a NetworkPolicy class that can be retrieved from NetworkPolicyManager.getNetworkPolicy().

Both the NetworkPolicyManager class and the NetworkPolicy class are public, but because of the @hide class, it is not a public API, and the hurdle seems to be high.
I think it is possible to use it by using reflection, but it is not a legitimate method, so I don't think the Android version will guarantee it to work.