class_docstr: Example for using extension class in c++
code: def __getitem__(self, idx):
      return ivec_get(self, idx)
  
file_path: tvm/apps/extension/python/tvm_ext/__init__.py
imports: from __future__ import absolute_import
  import os
  import ctypes
  import tvm
  from tvm import te
label_desc: Use image node_id 2 for calling the IntVec obj's underlying member method code with example usage: obj.__getitem__(idx) and returns: ivec_get