src/Leevel/Database/Ddd/Specification.php
public function not(): ISpecification
    {
        return new self(function (IEntity $entity): bool {
            return !$this->isSatisfiedBy($entity);
        }, $this->handle);
    }
public function not(): ISpecification
    {
        return new self(function (IEntity $entity): bool {
            return !$this->isSatisfiedBy($entity);
        }, $this->handle);
    }
规约 Not 操作.

@return \Leevel\Database\Ddd\ISpecification