code: public static String compile( URL baseURL, String lessData,  Map<String, String> options ) throws LessException {
          return compile( baseURL, lessData, options, new ReaderFactory() );
      }
docs: Compile the less data from a string.
  
  @param baseURL
  the baseURL for import of external less data.
  @param lessData
  the input less data
  @param options
  some optional options, see constants for details
  @return the resulting less data
  @throws LessException
  if any error occur on compiling.