code: public static DeterministicKey deserializeB58(@Nullable DeterministicKey parent, String base58, NetworkParameters params) {
          return deserialize(params, Base58.decodeChecked(base58), parent);
      }
docs: Deserialize a base-58-encoded HD Key.
  @param parent The parent node in the given key's deterministic hierarchy.
  @throws IllegalArgumentException if the base58 encoded key could not be parsed.