code: def test_init_spec_none(self, mdl: model.Model):
      self.assertIsNone(mdl.init_spec())
  
imports: from absl.testing import absltest
  from absl.testing import parameterized
  from lit_nlp.api import dataset
  from lit_nlp.api import model
  from lit_nlp.api import types
label_desc: Use image node_id 5 for calling the ModelTest obj's underlying member method code with example usage: obj.test_init_spec_none(mdl) without return types