code: def unreplicate(tree):
      """Returns a single instance of a replicated array."""
      return jax.tree_util.tree_map(lambda x: x[0], tree)
  
imports: import collections
  import itertools
  import warnings
  from collections.abc import Iterable
  import jax
  import jax.numpy
  import numpy
  from jax import core, lax
  from jax.extend import linear_util
  from jax.interpreters import partial_eval
label_desc: Use image node_id 3 for calling a global function with example usage: unreplicate(tree) and returns: jax