code: @Nullable
    public static CascadingStyleSheet readFromStringStream (@Nonnull final String sCSS,
                                                            @Nonnull final CSSReaderSettings aSettings)
    {
      return readFromStream (new StringInputStreamProvider (sCSS, aSettings.getFallbackCharset ()), aSettings);
    }
docs: Read the CSS from the passed String using a byte stream.
  
  @param sCSS
  The source string containing the CSS to be parsed. May not be
  <code>null</code>.
  @param aSettings
  The settings to be used for reading the CSS. May not be
  <code>null</code>.
  @return <code>null</code> if reading failed, the CSS declarations
  otherwise.
  @since 3.8.2