car = $car; $this->headings = $headings; } public function headings(): array { return $this->headings; } // public function map($car): array // { // $contract = $car->latestBuyContract(); // return [ // $car->name, // $car->stammnummer, // $car->initial_date_formatted, // $contract ? $contract->date_formatted : null, // $contract ? $contract->price : null, // ]; // } public function collection() { return $this->car; } public function styles(Worksheet $sheet) { return [ 1 => ['font' => ['bold' => true]], ]; } }