Tap to select specific plane in ARCore with Unity - unity3d

Question

I'm trying to create a modification to the ARCore sample Andy placement app by only rendering a single plane instead of all the detected planes. I'd like to achieve this by tapping on the plane to be rendered. Here's what I've tried.
protected override void OnEndManipulation(TapGesture gesture)
{
if (gesture.WasCancelled)
{
return;
}
// If gesture is targeting an existing object we are done.
if (gesture.TargetObject != null)
{
return;
}
// Raycast against the location the player touched to search for planes.
TrackableHit hit;
TrackableHitFlags raycastFilter = TrackableHitFlags.PlaneWithinInfinity | TrackableHitFlags.PlaneWithinPolygon;
if (Frame.Raycast(gesture.StartPosition.x, gesture.StartPosition.y, raycastFilter, out hit))
{
Debug.Log("Entered into hit if condition");
// Use hit pose and camera pose to check if hittest is from the
// back of the plane, if it is, no need to create the anchor.
if ((hit.Trackable is DetectedPlane) &&
Vector3.Dot(FirstPersonCamera.transform.position - hit.Pose.position,
hit.Pose.rotation * Vector3.up) < 0)
{
//var andyObject = Instantiate(AndyPrefab, hit.Pose.position, hit.Pose.rotation);
Debug.Log("Hit at back of the current DetectedPlane");
}
else
{
if (PlaneFixed is false)
{
foreach (GameObject plane in DetectedPlaneGenerator.instance.PLANES) //RK
{
// THE PROBLEM IS HERE! HOW TO GET CORRECT TYPECAST?
if (hit.Trackable is plane)
{
Debug.Log("Plane Selected");
PlaneFixed = true;
FixPositionButton.gameObject.SetActive(true);
}
else
{
plane.SetActive(false);
}
}
}
}
}
}
The problem is that I'm unable to get the correct matching between a GameObject (PLANES - created in DetectedPlaneGenerator.cs) and the DetectedPlane object (return by hit.Trackable, using the PlaneWithinInfinity | PlaneWithinPolygon raycastfilters).
I've also seen the method to try and associate a 'tag' to the DetectedPlaneVisualizer (solution to this). However, I see that this too deals with planes using a GameObject. How to match the GameObject and Hit.Trackable (DetectedPlane Object) to identify which specific plane was just tapped on?