Exqlite.Connection.handle_close

You're seeing just the function handle_close, go back to Exqlite.Connection module for more information.
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handle_close(query, opts, state)

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Close a query prepared by c:handle_prepare/3 with the database. Return {:ok, result, state} on success and to continue, {:error, exception, state} to return an error and continue, or {:disconnect, exception, state} to return an error and disconnect.

This callback is called in the client process.