code: def test_default_initializer_is_zero(self):
      a = tf.Variable(1.0)
      b = utils.variable_like(a)
      self.assertEqual(0.0, b.numpy())
  
imports: from absl.testing import parameterized
  import numpy
  from sonnet.src import initializers
  from sonnet.src import test_utils
  from sonnet.src import utils
  import tensorflow
label_desc: Use image node_id 4 for calling the VariableLikeTest obj's underlying member method code with example usage: obj.test_default_initializer_is_zero() without return types