Collection<KnowledgePackage> knowledgePackages = kbuilder.getKnowledgePackages();
kbase.addKnowledgePackages( knowledgePackages );
for (KnowledgePackage kPackage : knowledgePackages) {
kbase.removeKnowledgePackage(kPackage.getName());
}
kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add( ResourceFactory.newByteArrayResource(rule2.getBytes()), ResourceType.DRL );
kbase.addKnowledgePackages( kbuilder.getKnowledgePackages() );