docs: public void addPackage(final PackageDescr packageDescr) {
          PackageRegistry pkgRegistry = getOrCreatePackageRegistry(packageDescr);
          if (pkgRegistry == null) {
              return;
          }
  
          // merge into existing package
          mergePackage(pkgRegistry, packageDescr);
  
          compileKnowledgePackages(packageDescr, pkgRegistry);
          wireAllRules();
          compileRete(packageDescr);
      }