.phpstorm.meta.php: How to type generic container

I'm using Doctrine which has a class called EntityManager that has a method EntityManager::getRepository, which returns an EntityRepository object. The repository has i.a. a method find that returns an object of the type passed to EntityManager::getRepository. Here is a simplified example that mimics this code structure:

<?php

namespace repository;

class Foo {}
class Bar {}

interface EntityManager {
    function get($name);
}

/** @var EntityManager $entityManager */
$fooRepository = $entityManager->get(\repository\Foo::class);
$foo = $fooRepository->find(1);
$barRepository = $entityManager->get(\repository\Bar::class);
$bar = $barRepository->find(1);
$obj = $entityManager->get('whatever')->find(1);

The type of $fooRepository, $barRepository, $foo, $bar and $obj is not known here. I use .phpstorm.meta.php to fix this:

<?php

interface FooRepository {
  /** @return Foo */
  function find($id);
}

interface BarRepository {
  /** @return Bar */
  function find($id);
}

namespace PHPSTORM_META {
    override(\repository\EntityManager::get(0), map([
      '\repository\Foo' => 'FooRepository',
      '\repository\Bar' => 'BarRepository',
      '' => 'object',
    ]));
}

Now $fooRepository is of type FooRepository and $foo is of type Foo. $barRepository is of type BarRepository and $bar is of type Bar. $obj is of type object. Everything is like expected. However, it is quite verbose and cumbersome to create such a generic *Repository interface for each class. Is there a generic approach?

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