Accessing Entity Managers
Laravel Doctrine uses DoctrineManager to provide an easy method of hooking into the internals of an Entity Manager for more advanced configuration than is possible with just a configuration file.
It provides access to three facets of Doctrine:
These objects are accessed per Entity Manager using the name configured for that EM in doctrine.php
Using DoctrineManager
Boilerplate example of DoctrineManager using facade LaravelDoctrine\ORM\Facades\Doctrine
Doctrine::extend('myManager', function(Configuration $configuration, Connection $connection, EventManager $eventManager) {
    //modify and access settings as is needed
});Using dependency injection in boot() of a ServiceProvider
public function boot(DoctrineManager $manager) {
    $manager->extend('myManager', function(Configuration $configuration, Connection $connection, EventManager $eventManager) {
        //modify and access settings as is needed
    });
}Implementing Your Own Extender
Additionally, you can write your own custom manager by implementing LaravelDoctrine\ORM\DoctrineExtender
class MyDoctrineExtender implements DoctrineExtender
{
    /**
     * @param Configuration $configuration
     * @param Connection    $connection
     * @param EventManager  $eventManager
     */
    public function extend(Configuration $configuration, Connection $connection, EventManager $eventManager)
    {
        //your extending code...
    }
}$manager->extend('myManager', MyDoctrineExtender::class);