code: def test_empty(self):
      stack = Stack.create(7, jnp.zeros((), jnp.int32))
      self.assertTrue(stack.empty())
  
file_path: jax/tests/stack_test.py
imports: from absl.testing import absltest
  import jax.numpy
  from jax._src.lax.stack import Stack
  from jax._src import test_util
  from jax import config
label_desc: Use image node_id 1 for calling the StackTest obj's underlying member method code with example usage: obj.test_empty() without return types