code: def testInitializerKeysInvalidWithoutBias(self):
      with self.assertRaisesRegex(ValueError, "b_init must be None"):
          linear.Linear(
              1, with_bias=False, b_init=tf.zeros_initializer()
          )
  
imports: from absl.testing import parameterized
  import numpy
  from sonnet.src import linear
  from sonnet.src import test_utils
  import tensorflow
label_desc: Use image node_id 3 for calling the LinearTest obj's underlying member method code with example usage: obj.testInitializerKeysInvalidWithoutBias() without return types