code: public KeyPair unwrapKeyPair(String wrappedPrivateKey, String encodedPublicKey) {
  
          PrivateKey privateKey = unwrapPrivateKey(wrappedPrivateKey);
          PublicKey publicKey = decodePublicKey(encodedPublicKey);
          return new KeyPair(publicKey, privateKey);
      }
docs: Convenience method to unwrap a public-private key pain in a single call.
  
  @param wrappedPrivateKey The wrapped key, base-64 encoded, as returned by
  {@link #wrapPrivateKey(PrivateKey)}.
  @param encodedPublicKey  The public key, base-64 encoded, as returned by
  {@link #encodePublicKey(PublicKey)}.
  @return A {@link KeyPair} containing the unwrapped {@link PrivateKey} and the decoded {@link PublicKey}.