Accessing an entire object in volt

I've got an object injected into the DI:

$di->setShared('myobject', function(){
    return new \NS\Object('whatever');
});

Now I can access object methods/variables in volt no problem:

{{ myobject.doSomething('somevar') }}

// results in php code: 
$this->myobject->doSomething('somevar');

However, if I want to pass that entire object to another function using volt, it doesn't work:

{{ anotherobject.doSomethingWithObject(myobject) }}

// results in php code -- note lack of $this
$this->anotherobject->doSomethingWithObject($myobject);

Is there another volt function I need to use to ensure the DI injected object is used? And not just a local $object instead?

Thanks.