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After bluesky/event-model#352, bluesky descriptors are allowed to contain
None
in the shape (meaning unknown or variable length for that dimension).This is an initial pass at broadening the type hints of
shape
in ophyd-async to allow this to be used.I've made the areadetector implementation error on this for now, as it's not clear to me whether areadetector can conceptually do this, or how to deal with chunking. Happy to defer to areadetector users on best behaviour there.