code: def getOverlayTransformTrackedDeviceRelative(self, ulOverlayHandle):
          
  
          fn = self.function_table.getOverlayTransformTrackedDeviceRelative
          punTrackedDevice = TrackedDeviceIndex_t()
          pmatTrackedDeviceToOverlayTransform = HmdMatrix34_t()
          result = fn(ulOverlayHandle, byref(punTrackedDevice), byref(pmatTrackedDeviceToOverlayTransform))
          return result, punTrackedDevice, pmatTrackedDeviceToOverlayTransform
docs: Gets the transform if it is relative to a tracked device. Returns an error if the transform is some other type.