Show aggregations even if count is 0

Summary:

In aggregations lets say I have a picklist of 30 values , in the response I get the values only if records are present, but we need to get all irrespctive of records are there or not.

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Example US shows only if count is there, I want to show all keys irrespective of the count using adaptive search aggregation API.There is a q getting passes is there a way to not pass any query.

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