code: @Nullable
    public static IJson readFromString (@Nonnull final String sJson)
    {
      return readFromReader (new NonBlockingStringReader (sJson), (IJsonParseExceptionCallback) null);
    }
docs: Read the Json from the passed String using a character stream. An
  eventually contained <code>@charset</code> rule is ignored.
  
  @param sJson
  The source string containing the Json to be parsed. May not be
  <code>null</code>.
  @return <code>null</code> if reading failed, the Json declarations
  otherwise.