code: @Nullable
    public static String getLastToken (@Nullable final String sStr, @Nullable final String sSearch)
    {
      if (StringHelper.hasNoText (sSearch))
        return sStr;
      final int nIndex = getLastIndexOf (sStr, sSearch);
      return nIndex == StringHelper.STRING_NOT_FOUND ? sStr : sStr.substring (nIndex + getLength (sSearch));
    }
docs: Get the last token from (and excluding) the separating string.
  
  @param sStr
  The string to search. May be <code>null</code>.
  @param sSearch
  The search string. May be <code>null</code>.
  @return The passed string if no such separator token was found.