@Deprecated
  public static Keyset getKeyset(KeysetHandle keysetHandle) {
    return keysetHandle.getKeyset();
  }
@return the keyset underlying this {@code keysetHandle}.
@deprecated Instead, call "KeysetHandle.getAt()" to get information about individual keys or
    TinkProtoKeysetFormat if you need a serialized keyset.
java_src/src/main/java/com/google/crypto/tink/CleartextKeysetHandle.java