code: protected JournalSegment<E> newSegment(JournalSegmentFile segmentFile, JournalSegmentDescriptor descriptor) {
      return new JournalSegment<>(segmentFile, descriptor, storageLevel, maxEntrySize, indexDensity, namespace);
    }
docs: Creates a new segment instance.
  
  @param segmentFile The segment file.
  @param descriptor The segment descriptor.
  @return The segment instance.