Resets a named object manager.
This method is useful when an object manager has been closed because of a rollbacked transaction AND when you think that it makes sense to get a new one to replace the closed one.
Be warned that you will get a brand new object manager as the existing one is not useable anymore. This means that any other object with a dependency on this object manager will hold an obsolete reference. You can inject the registry instead to avoid this problem.
string $name The object manager name (null for the default one):
\Doctrine\Common\Persistence\ObjectManager
function resetManager($name = null);