code: def test_tree_map_zipped_empty(self):
      outputs = tree_util.tree_map_zipped(
          lambda *args: jnp.concatenate(args), []
      )
      self.assertEmpty(outputs)
  
file_path: rlax/rlax/_src/tree_util_test.py
imports: from absl.testing import absltest
  import chex
  import jax
  import jax.numpy
  import numpy
  from rlax._src import tree_util
label_desc: Use image node_id 4 for calling the TreeUtilTest obj's underlying member method code with example usage: obj.test_tree_map_zipped_empty() without return types