public static long previousOrSameSundayToMillis() {
        Instant now = DateTimeUtils.epochMilli();
        return previousOrSameSundayToMillis(now, DEFAULT_ZONE);
    }
Returns the current time in milliseconds.
precision : milliseconds
@return the current time in milliseconds
commons-timeseries/src/main/java/com/navercorp/pinpoint/common/timeseries/time/DateTimeUtils.java