Delegate creation responsibility to EM / Repos

FooRepository.php

<?php
class FooRepository extends EntityRepository implements FooRepositoryInterface
{
    public function startFooing($bar, $baz)
    {
        $em = $this->getEntityManager();
        
        // Let's imagine we could
        $foo = $em->create(Foo::class, [$bar, $baz]);
        
        // And EM could resolve other dependencies (like the Emitter)
        return $foo;
    }
}