Question: Is it possible to use WIDS to look up sample by key instead of index?

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I see that in MMTar there is a method to lookup sample by file name (using get_by_name function)

Is it possible to have a similar interface exposed with WIDS? Any ideas on how one can get started on implementing this?

I appreciate that it may not be straightforward as we use file counts to figure out the shard a particular index belongs to.