@CanIgnoreReturnValue
  @Deprecated
  public synchronized KeysetManager add(KeyHandle keyHandle, KeyAccess access)
      throws GeneralSecurityException {
    return add(keyHandle);
  }
Adds the input {@code KeyHandle} to the existing keyset with {@code OutputPrefixType.TINK}.

@throws GeneralSecurityException if the given {@code KeyAccess} does not grant access to the
    key contained in the {@code KeyHandle}.
@throws UnsupportedOperationException if the {@code KeyHandle} contains a {@code TinkKey} which
    is not a {@code ProtoKey}.
@deprecated We recommend to use the {@code KeysetHandle.Builder} API.
java_src/src/main/java/com/google/crypto/tink/KeysetManager.java