This will be complete when GVL supports an option to disable shifting and reference genome padding, such that returned sequences correspond exactly to the regions originally given to gvl.write. To do this, GVL must also support returning ragged arrays or batches of data padded with something other reference sequence.

Implementation notes
For the ragged array case, this would probably look like partitioning out the ragged array's data accordingly to the reconstruction alg so it could be quite simple. For the padding case, this is also relatively easy by simply skipping the ref-padding block in the reconstruction alg.