Why are two identical namespaces here~~~~~ in the prestashop folder

The Prestashop namespaces do not follow the folder structure. The SessionHandlerInterface is located at src/Core/Session/SessionHandler.php and has the namespace

PrestaShop\PrestaShop\Core\Session

namespace PrestaShop\PrestaShop\Core\Session;

use Symfony\Component\HttpFoundation\Session\Session;
use Symfony\Component\HttpFoundation\Session\SessionInterface;
use Symfony\Component\HttpFoundation\Session\Storage\PhpBridgeSessionStorage;

class SessionHandler implements SessionHandlerInterface
{ ... }