code: def wrap_singleton(f):
      return lambda *xs: (f(*xs),)
  
imports: from collections import namedtuple
  from functools import partial
  import numpy.random
  from absl.testing import absltest
  from absl.testing import parameterized
  import itertools
  import jax.numpy
  from jax import jit, jvp, vjp
  import jax._src.test_util
  from jax import config
  from jax._src.util import unzip2, safe_zip, safe_map
label_desc: Use image node_id 13 for calling a global function with example usage: wrap_singleton(f) and returns: function