presto-main/src/main/java/io/prestosql/failuredetector/FailureDetectorConfig.java/FailureDetectorConfig/setExpirationGraceInterval
class FailureDetectorConfig:    @Config("failure-detector.expiration-grace-interval")
    @ConfigDescription("How long to wait before 'forgetting' a service after it disappears from discovery")
    public FailureDetectorConfig setExpirationGraceInterval(Duration expirationGraceInterval)
    {
        this.expirationGraceInterval = expirationGraceInterval;
        return this;
    }