Create a JS variable to keep track of if a selection is made in `cert_agg_down`. This can simply be a variable keeping track of a boolean. After the selection in `cert_agg_down`, trigger a JS query that updates the value of the JS variable that you made. Leverage the `setValue` function to set a new value for your variable. Add a trigger, on completion of the JS query, that refreshes the `drillDowntable` component.
You should use 1 query to populate `drillDowntable’ that uses the JS variable you created to output the expected value. This query should output a value for when a selection in `cert_agg_down` is made (tracked by your JS variable) and another for when the selection is not made (again tracked by your JS variable).