public void setLeastWindowExceptionRateMultiple(double leastWindowExceptionRateMultiple) {
        this.leastWindowExceptionRateMultiple = leastWindowExceptionRateMultiple;
    }
Is regulation effective boolean.

@return the boolean
fault/fault-tolerance/src/main/java/com/alipay/sofa/rpc/client/aft/FaultToleranceConfig.java