['required', 'integer', 'min:1'], 'to' => ['required', 'email'], 'subject' => ['required', 'string'], 'body_html' => ['required', 'string'], 'code' => ['required', 'string'], 'variant' => ['nullable', 'string'], 'incident_date' => ['nullable', 'date_format:Y-m-d'], ]; } }