code: def _maybe_value_and_grad(kind):
      if kind == "lax":
  
          def value_and_grad(fn):
              def wrapped(*args, **kwargs):
                  return fn(*args, **kwargs), None
  
              return wrapped
  
          return value_and_grad
      else:
          return jax.value_and_grad
  
imports: import functools
  import timeit
  from typing import Optional
  import equinox
  import equinox.internal
  import jax
  import jax.lax
  import jax.lib
  import jax.numpy
  import jax.random
  import jax.tree_util
  import pytest
  from .helpers import tree_allclose
label_desc: Use image node_id 7 for calling a global function with example usage: _maybe_value_and_grad(kind) and returns: value_and_grad, jax, wrapped, fn,  None