code: static SegmentChunk forSegment(String segmentName, long startOffset) {
          return new SegmentChunk(StreamSegmentNameUtils.getSegmentChunkName(segmentName, startOffset), startOffset);
      }
docs: Creates a new instance of the SegmentChunk class.
  
  @param segmentName The name of the owning Segment (not the name of this SegmentChunk).
  @param startOffset The offset within the owning Segment where this SegmentChunk starts at.
  @return A new SegmentChunk.