public function __toString()
{
$str = parent::__toString();
$str .= 'Brand: ' . $this->getCarBrand() . '<br>';
$str .= 'Vehicle: ' . $this->getCarVehicle() . '<br>';
return $str;
}
public function __construct(Engine $engine, $colour = Vehicle::UNPAINTED)
{
parent::__construct($engine, $colour);
}