AbacusSql.Completable.completable_children

You're seeing just the callback completable_children, go back to AbacusSql.Completable module for more information.
Link to this callback

completable_children(context)

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Specs

completable_children(context()) :: {:ok, [Item.t()], context()}

Returns a list of completion items that this schema offers.

The passed context is a term that can be given to AbacusSql.Completion.autocomplete/2.