code: def transform_actor(self):
      # no transformation is required in 3D tool,
      # self.xz_align_matrix is a identity matrix
      self.actor.SetUserMatrix(self.xz_align_matrix)
  
imports: import vtk
  import json
  import numpy
  import argparse
  import sys
  import subprocess
  from plyfile import PlyData
label_desc: Use image node_id 7 for calling the Render obj's underlying member method code with example usage: obj.transform_actor() without return types