Transform record before import to database

    protected function beforeFill()
    {
        $this->data['data'] = [
            'price' => $this->data['price'],
            'brokerage' => $this->data['brokerage'],
            'quantity' => $this->data['quantity'],
        ];
        unset(
            $this->data['price'],
            $this->data['brokerage'],
            $this->data['quantity'],
        );
    }