### Body

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### Committer

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"""Duration calculation."""
        end_date = self.get("end_date")
        start_date = self.get("start_date")
        difference = "0s"
        if start_date and end_date:
            difference = td_format(end_date - start_date)
        return difference
    formatters_columns = {
        "execution_date": wwwutils.datetime_f("execution_date"),
        "state": wwwutils.state_f,
        "start_date": wwwutils.datetime_f("start_date"),
        "end_date": wwwutils.datetime_f("end_date"),
        "queued_at": wwwutils.datetime_f("queued_at"),
        "dag_id": wwwutils.dag_link,
        "run_id": wwwutils.dag_run_link,
        "conf": wwwutils.json_f("conf"),
        "duration": duration_f,
    }
    @action("muldelete", "Delete", "Are you sure you want to delete selected records?", single=False)
    @action_has_dag_edit_access
    @action_logging
    def action_muldelete(self, items: list[DagRun]):