rechunker object has no attribute "persist"

[pmav99]

using 0.4.2, when trying to persist a Rechunker object on a dask cluster, an AttributeError gets raised.

E.g. when running the tutorial, cell 11 raises:

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-11-d4bee8fff75b> in <module>
----> 1 future = array_plan.persist()
      2 progress(future)

AttributeError: 'Rechunked' object has no attribute 'persist'

[pmav99]

OK, it seems that an array_plan.plan.persist() is needed instead. I will make a PR

[rabernat]

Thanks for reporting!

I'm puzzled why this API has changed.

[pmav99]

This seems to be the commit that introduced the change b6b4a52

So, should we just update the docs or you'd rather think more over it?