code: def applyTransform(self):
          
  
          fn = self.function_table.applyTransform
          pOutputPose = TrackedDevicePose_t()
          pTrackedDevicePose = TrackedDevicePose_t()
          pTransform = HmdMatrix34_t()
          fn(byref(pOutputPose), byref(pTrackedDevicePose), byref(pTransform))
          return pOutputPose, pTrackedDevicePose, pTransform
docs: Convenience utility to apply the specified transform to the specified pose.
            This properly transforms all pose components, including velocity and angular velocity