code: def save_collision_geometry(obj, output_path):
      collision_path = output_path / "collision_geometry.obj"
      print(collision_path)
      with select(obj), center(obj):
          bpy.ops.export_scene.obj(
              filepath=str(collision_path),
              axis_forward="Y",
              axis_up="Z",
              use_selection=True,
              use_materials=False,
          )
      return collision_path
  
imports: import contextlib
  import copy
  import json
  import pathlib
  import tarfile
  import shutil
  import numpy
  import trimesh
  from kubric.safeimport.bpy import bpy
label_desc: Use image node_id 14 for calling a global function with example usage: save_collision_geometry(obj, output_path) and returns: collision_path