public function downloadSummaryPerEmployee(Employee $employee)
 {
     $leaves = $employee->employee_special_leaves()->certified()->orderBy('date_from', 'desc')->get();
     if ($leaves->isEmpty()) {
         flash()->warning('Special leave summary is empty.');
         return redirect()->back();
     }
     write_form(new \DNSCHumanResource\FormWriters\WriteEmployeeSpecialLeaveSummary($leaves));
 }