code: public String compile(final DataProvider dataProvider,
                            final InputStream templateStream) {
          return compile(dataProvider,templateStream, true );
      }
docs: Generates DRL from a data provider for the spreadsheet data and templates.
  
  @param dataProvider   the data provider for the spreadsheet data
  @param templateStream the InputStream for reading the templates
  @return the generated DRL text as a String