reference documentation
for example:
class MyObserver
{
    public function saving(Model $model)
    {
        // $model
    }
}this method is currently used to deal with it:
protected $request;
    public function __construct(Request $request)
    {
        $this->request = $request;
    }
   although it is said that the current problem can be solved, I hope to be able to modify it in a similar way:
public function saving(Model $model, argument1, argument2....)ask for advice on how to achieve this thought, or some other more convenient method, thank you
