code: def test_wrap_pytree_node_no_error(self):
      @struct.dataclass
      class A(struct.PyTreeNode):
          a: int
  
file_path: flax/tests/struct_test.py
imports: import dataclasses
  from typing import Any
  import jax
  from absl.testing import absltest
  from jax._src.tree_util import prefix_errors
  from flax import struct
label_desc: Use image node_id 6 for calling the StructTest obj's underlying member method code with example usage: obj.test_wrap_pytree_node_no_error() without return types