protocolHelper.addWebProtocol("https");
        protocolHelper.addWebProtocol("ftp");
        protocolHelper.addFileProtocol("smb");
        protocolHelper.addFileProtocol("nfs");

        assertEquals(3, protocolHelper.getWebProtocols().length);
        assertEquals(3, protocolHelper.getFileProtocols().length);

        assertTrue(protocolHelper.isValidWebProtocol("https://example.com"));

- Add a new counter metrics `apiserver_admission_webhook_rejection_count` with details about the causing for a webhook rejection. ([#81399](https://github.com/kubernetes/kubernetes/pull/81399), [@roycaihw](https://github.com/roycaihw))
- NFS Drivers are now enabled to collect metrics, StatFS metrics provider is used to collect the metrics. (@brahmaroutu) ([#75805](https://github.com/kubernetes/kubernetes/pull/75805), [@brahmaroutu](https://github.com/brahmaroutu))