code: def test_hash(self):
      x = provider.TensorDatum(
          step=12, wall_time=0.25, numpy=np.array([1.25])
      )
      with self.assertRaisesRegex(TypeError, "unhashable type"):
          hash(x)
  
imports: import numpy
  from tensorboard import test
  from tensorboard.data import provider
label_desc: Use image node_id 4 for calling the TensorDatumTest obj's underlying member method code with example usage: obj.test_hash() without return types