docs: public static long getOffsetFromRollupQualifier(final int qualifier, 
        final RollupInterval interval) {
  
      long offset = 0;
      if ((qualifier & Const.MS_FLAG) == Const.MS_FLAG) {
        LOG.warn("Unexpected rollup qualifier in milliseconds: " + qualifier 
            + " for interval " + interval);
        offset = (qualifier & 0x0FFFFFC0) >>> (Const.MS_FLAG_BITS) / 1000;
      } else {
        offset = (qualifier & 0xFFFF) >>> Const.FLAG_BITS;
      }
      return offset * interval.getIntervalSeconds() * 1000;
    }