public function __construct($id, $name = null, $ram = null, $disk = null, $bandwidth = null, $price = null, $provider = null, $extra = [])
{
$this->id = $id;
$this->name = $name;
$this->ram = $ram;
$this->disk = $disk;
$this->bandwidth = $bandwidth;
$this->price = $price;
$this->provider = $provider;
$this->extra = $extra;
}