code: @Nullable
      public byte[] getSegment(@NotNull JpegSegmentType segmentType, int occurrence)
      {
          return getSegment(segmentType.byteValue, occurrence);
      }
docs: Gets segment data for a specific occurrence and type.  Use this method when more than one occurrence
  of segment data for a given type exists.
  
  @param segmentType identifies the required segment
  @param occurrence  the zero-based index of the occurrence
  @return the segment data as a byte[], or null if no segment exists for the type &amp; occurrence