code: def setOverlayTransformTrackedDeviceRelative(self, ulOverlayHandle, unTrackedDevice):
          
  
          fn = self.function_table.setOverlayTransformTrackedDeviceRelative
          pmatTrackedDeviceToOverlayTransform = HmdMatrix34_t()
          result = fn(ulOverlayHandle, unTrackedDevice, byref(pmatTrackedDeviceToOverlayTransform))
          return result, pmatTrackedDeviceToOverlayTransform
docs: Sets the transform to relative to the transform of the specified tracked device.