* @throws IOException
*/
public void addPackageFromDrl(final Reader source,
final Reader dsl) throws DroolsParserException,
IOException {
this.resource = new ReaderResource( source, ResourceType.DSLR );
final DrlParser parser = new DrlParser( configuration.getLanguageLevel() );
final PackageDescr pkg = parser.parse( source, dsl );
this.results.addAll( parser.getErrors() );
if ( !parser.hasErrors() ) {