public static KeysetHandle parseKeyset(KeysetReader reader, SecretKeyAccess access)
      throws GeneralSecurityException, IOException {
    if (access == null) {
      throw new NullPointerException("SecretKeyAccess cannot be null");
    }
    return CleartextKeysetHandle.read(reader);
  }
Parse a keyset from the reader.

<p>This is used to parse keysets that may contain secret key material. The second argument has
to be {@code InsecureSecretKeyAccess.get()}.
java_src/src/main/java/com/google/crypto/tink/LegacyKeysetSerialization.java