Configuration c = (Configuration) getChildItem(DomainModel.CONFIGURATION);
Configuration c = (Configuration) getChild(KnowledgeModel.CONFIGURATION);
    public void initialize() throws Exception {        super.initialize();        Configuration c = (Configuration) getChildItem(DomainModel.CONFIGURATION);        if (c != null) {            setChildItem(DomainModel.SYSTEM_INFORMATION, createChildItem(getDefaultSystemInformation()));        } else {            throw new Exception("Could not initialize domain model. The configuration is null.");        }    }