private static boolean mustInsert(int nextIdx, long[] valueTimeStamps, long tsAtInsertPoint) {
      return (nextIdx < valueTimeStamps.length) && (valueTimeStamps[nextIdx] <= tsAtInsertPoint);
    }
Return true if the current ts must be inserted instead of being mapped to the tsAtInsertPoint
geode-core/src/main/java/org/apache/geode/internal/statistics/StatArchiveReader.java