code: def test_inline(self):
      r = []
      f = once.once(lambda: r.append(None))
      for _ in range(10):
          f()
      self.assertEqual(r, [None])
  
imports: import pickle
  from absl.testing import absltest
  from absl.testing import parameterized
  from sonnet.src import once
label_desc: Use image node_id 8 for calling the OnceTest obj's underlying member method code with example usage: obj.test_inline() without return types