public static void register() throws GeneralSecurityException {
    Registry.registerKeyManager(new LegacyAesGcmHkdfStreamingTestKeyManager(), true);
  }
Type url that this manager does support.
java_src/src/main/java/com/google/crypto/tink/streamingaead/internal/LegacyAesGcmHkdfStreamingTestKeyManager.java