code: def test_coverage(self):
      all_modules = frozenset(test_utils.find_subclasses(hk, hk.Module))
      tested_modules = {
          type(descriptors.unwrap(d.create())) for d in ALL_MODULES
      }
      self.assertEmpty(all_modules - (tested_modules | IGNORED_MODULES))
  
imports: from absl.testing import absltest
  import haiku
  from haiku._src import test_utils
  from haiku._src.integration import descriptors
label_desc: Use image node_id 1 for calling the DescriptorsTest obj's underlying member method code with example usage: obj.test_coverage() without return types