SlicerSoundControl Questions

Hello! I have a few questions ^-^.

In soundnav.py:

n line 261, why do we need to check again that we are working with an instrumentName?

Also, about this method:

In lines 329 to 333, I see you get the Distance using that method. Which library should I check to see all the attributes from the instrumentNode? Because I want to find the same attributes you get in the “vtkMRMLTransformNode” (X,Y and Z from the needle and the target)
Thanks for reading!