src/Leevel/Database/Ddd/Specification.php
public function handle(Select $select, IEntity $entity): void
    {
        call_user_func($this->handle, $select, $entity);
    }
public function handle(Select $select, IEntity $entity): void
    {
        call_user_func($this->handle, $select, $entity);
    }
规约实现.

@param \Leevel\Database\Ddd\Select  $select
@param \Leevel\Database\Ddd\IEntity $entity