code: def is_valid(self) -> bool:
      return (
          self._jax_trace is current_jax_trace()
          and self._nnx_trace is current_nnx_trace()
      )
  
imports: import contextlib
  import dataclasses
  import threading
  import typing
  import jax
  import jax.core
  from jax.core import MainTrace
  from flax.experimental.nnx.nnx import reprlib
label_desc: Use image node_id 4 for calling the TraceState obj's underlying member method code with example usage: obj.is_valid() and returns: unknown