code: public String compile(boolean showPackage,
                            final InputStream xlsStream,
                            final InputType type) {
          return compile( xlsStream,
                          type,
                          new DefaultRuleSheetListener( showPackage, trimCell ) );
      }
docs: Generates DRL from the input stream containing the spreadsheet.
  
  @param showPackage
  tells it to print or not print any package statements in the spreadsheet.
  @param xlsStream
  The stream to the spreadsheet. Uses the first worksheet found
  for the decision tables, ignores others.
  @return DRL xml, ready for use in drools.