code: def get_caching_key(self, ctx):
      del ctx
      return 0
  
imports: import threading
  import unittest
  import gast
  from nvidia.dali._autograph.pyct import transformer
  from nvidia.dali._autograph.pyct import transpiler
label_desc: Use image node_id 1 for calling the TestTranspiler obj's underlying member method code with example usage: obj.get_caching_key(ctx) and returns: int