docs: public static long getWeekStartTime(final long time) {
          final Calendar start = Calendar.getInstance();
          start.setFirstDayOfWeek(Calendar.MONDAY);
          start.setTimeInMillis(time);
          start.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
          start.set(Calendar.HOUR, 0);
          start.set(Calendar.MINUTE, 0);
          start.set(Calendar.SECOND, 0);
          start.set(Calendar.MILLISECOND, 0);
  
          return start.getTimeInMillis();
      }