docs: public void addPackageDescr(PackageDescr descr) {
          try {
  
              PackageDescrVisitor ruleFlattener = new PackageDescrVisitor( result.getVerifierData(),
                                                                           jars );
  
              ruleFlattener.visitPackageDescr( descr );
  
          } catch ( Throwable t ) {
              t.printStackTrace();
          }
      }