code: def value_and_grad(func):
      def grad_fn(xs):
          return ivy.to_native(func(xs))
  
      def callback_fn(xs):
          xs = ivy.nested_map(
              lambda x: ivy.to_native(x), xs, include_derived=True
          )
          value, grad = jax.value_and_grad(grad_fn)(xs)
          return ivy.to_ivy(value), ivy.to_ivy(grad)
  
      return callback_fn
  
file_path: ivy/ivy/functional/backends/jax/gradients.py
imports: import jax
  import jax.lax
  from ivy.functional.backends.jax import JaxArray, NativeArray
  from typing import Optional, Callable, Sequence, Union, Tuple
  import ivy
  from ivy.functional.ivy.gradients import _get_required_float_variables, _get_y_and_ret_idxs, _get_native_variables_and_indices, _set_duplicates, _process_func_ret_and_grads
label_desc: Use image node_id 6 for calling a global function with example usage: value_and_grad(func) and returns: callback_fn, ivy, ivy,  ivy