public static String unHide(final String key){
  return isHidden(key) ? key.substring(HIDDEN_PREFIX_LENGTH) : key;
}

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 .
