code: def test_lookup_all(self):
      sub_registered = registry.lookup_all(DecoratorBase)
      self.assertLen(sub_registered, 2)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from absl.testing import absltest
  from model_search import registry
label_desc: Use image node_id 3 for calling the RegisterTest obj's underlying member method code with example usage: obj.test_lookup_all() without return types