public static String unHide(final String key) {
            return isHidden(key) ? key.substring(HIDDEN_PREFIX_LENGTH) : key;
        }
Turn the provided hidden key into an non-hidden key. If the key is not a hidden key, return key.

@param key The hidden key
@return The non-hidden representation of the key
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/Graph.java