code: public static String getSegmentChunkName(String segmentName, long offset) {
          Preconditions.checkArgument(!segmentName.contains(OFFSET_SUFFIX), "segmentName is already a SegmentChunk name");
          return segmentName + OFFSET_SUFFIX + Long.toString(offset);
      }
docs: Gets the name of the SegmentChunk for the given Segment and Offset.
  
  @param segmentName The name of the Segment to get the SegmentChunk name for.
  @param offset      The starting offset of the SegmentChunk.
  @return The SegmentChunk name.