On Laravel 10 site defined an Interface class I got error :

Access type for interface member must be omitted

when I define some method as “protected”:

namespace AppLibraryServicesInterfaces;

interface PostRatingInterface
{
    public static function calc(int $postId): float;

    protected static function getMembershipMarkValue(): float;

Does it mean that I have to define all interface methods as “public” – or omit it – it would the same “public”?

"php": "8.2",
"livewire/livewire": "^3.4.10",

Thanks in advance!