Stop the network proxy.
- iOS 9.0+
- macOS 10.11+
NEProvidercode indicating why the proxy is being stopped. For a list of possible codes, see
A block that must be executed when the proxy is fully stopped.
This method is called by the system to stop the network proxy.
NEApp subclasses must override this method.
Do not use this method to stop the proxy from the App Proxy Provider. Use