@Override
    public void removeRule(final RuleData ruleData) {
        Optional.ofNullable(ruleData.getHandle()).ifPresent(rule -> CACHED_HANDLE.get().removeHandle(CacheKeyUtils.INST.getKey(ruleData)));
    }
The type Hystrix plugin data handler.
shenyu-plugin/shenyu-plugin-fault-tolerance/shenyu-plugin-hystrix/src/main/java/org/apache/shenyu/plugin/hystrix/handler/HystrixPluginDataHandler.java