LogSegmentName getNextPositionName() {
    checkSegmented();
    return new LogSegmentName(position + 1, 0);
  }
@return what should be the name of the log segment that is exactly one position higher than this one. The
generation of the returned name will start from the lowest generation number.
ambry-store/src/main/java/com/github/ambry/store/LogSegmentName.java