generateUuidUsing = $callback; return $this; } public function generateUuid(): ?string { if ($this->generateUuidUsing) { return $this->evaluate($this->generateUuidUsing); } if ($this->generateUuidUsing === false) { return null; } return (string) Str::uuid(); } public static function fake(): Closure { return static::configureUsing( fn ($component) => $component->generateUuidUsing(false), ); } }