<?phpnamespaceApp\Flux;interfaceAccountInterface{publicfunctiongetId();publicfunctiongetBalance():?float;publicfunctionsetBalance(float$balance):self;// public function addAmount(float $montant): self;publicfunctiongetCurrency():string;publicfunctionsetCurrency(string$currency):self;publicfunctionsetAccountableObject(AccountableInterface$object):self;publicfunctiongetAccountableObject():AccountableInterface;}