Swift subclass SCNNode hittest always returns SCNNode * not * subclass

I have a subclass "ExSCNNode" of SCNNode to add additional properties and behavior to the SCNNode.

class ExSCNNode : SCNNode {
...
}

      

        
        
        
      

    

I than create a scene with ExSCNNode.

let testnode = ExSCNNode()

      

        
        
        
      

    

When smoothing a scene:

// check what nodes are tapped
let p = gestureRecognize.location(in: scnView)
let hitResults = scnView.hitTest(p, options: [:])

// check that we clicked on at least one object
if hitResults.count > 0 {

for hit in hitResults {
let hitnode = hit.node
...

      

        
        
        
      

    

hitnode is SCNNode, not ExSCNNode. But I want ExSCNNode to get access to advanced functionality.

How can I access the subclass instead of the SCNNode class?