code: def slicer(x, bdim):
      if bdim is None:
          return lambda _: x
      else:
          return lambda i: lax.index_in_dim(x, i, bdim, keepdims=False)
  
file_path: jax/jax/_src/internal_test_util/lax_test_util.py
imports: from __future__ import annotations
  import collections
  import itertools
  from typing import Union, cast
  from jax import lax
  from jax._src import dtypes
  from jax._src import test_util
  from jax._src.util import safe_map, safe_zip
  import numpy
  from jax import config
label_desc: Use image node_id 6 for calling a global function with example usage: slicer(x, bdim) and returns: function, function