Versioned.Helpers.deleted_versions

You're seeing just the function deleted_versions, go back to Versioned.Helpers module for more information.
Link to this function

deleted_versions(changeset, opts)

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Specs

deleted_versions(Ecto.Changeset.t(), keyword()) :: [Ecto.Schema.t()]

Recursively crawl changeset and compile a list of version structs with is_deleted set to true.