gistfile1.php

<?php

final class SyncedIdentityRepository extends AggregateRepository
{
    public function get(ExternalId $id)
    {
        $aggregate = $this->getAggregateRoot($id->__toString());
        if (null === $aggregate) {
            $aggregate = new SyncedIdentity::create($id);
        }
        
        return $aggregate;
    }
}