code: def test_coverage(self):
      all_modules = frozenset(
          test_utils.find_all_sonnet_modules(snt, snt.Module)
      )
      tested_modules = {
          type(descriptors.unwrap(d.create()))
          for d in BATCH_MODULES + RECURRENT_MODULES + OPTIMIZER_MODULES
      }
      self.assertEmpty(all_modules - (tested_modules | IGNORED_MODULES))
  
imports: import sonnet
  from sonnet.src import test_utils
  from sonnet.src.conformance import descriptors
  import tensorflow
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