['nullable','string','max:20'], 'date_from' => ['nullable','date'], 'date_to' => ['nullable','date'], 'minimum_balance' => ['nullable','numeric','min:0'], 'aging_bucket' => ['nullable','string','max:40'], 'parent_id' => ['nullable','integer'], 'student_id' => ['nullable','integer'], 'follow_up_status' => ['nullable','string','max:60'], 'last_contacted_before' => ['nullable','date'], 'next_follow_up_due_before' => ['nullable','date'], 'promise_to_pay_due_before' => ['nullable','date'], 'include_paid_invoices' => ['nullable','boolean'], 'include_inactive_students' => ['nullable','boolean'], ]; } }