code: @Nonnull
    @Nonempty
    private static String _getUnifiedDecimal (@Nonnull @Nonempty final String sStr)
    {
      return StringHelper.replaceAll (sStr, ',', '.');
    }
docs: Get the unified decimal string for parsing by the runtime library. This is
  done by replacing ',' with '.'.
  
  @param sStr
  The string to unified. Never <code>null</code>.
  @return Never <code>null</code>.