code: public static KnowledgeBuilderConfiguration newKnowledgeBuilderConfiguration(Properties properties,
                                                                                   ClassLoader... classLoaders) {
          return FactoryServiceHolder.factoryService.newKnowledgeBuilderConfiguration( properties, classLoaders );
      }
docs: Create a KnowledgeBuilderConfiguration on which properties can be set. Use
  the given properties file and ClassLoader - either of which can be null.
  @return
  The KnowledgeBuilderConfiguration.