code: def flatten_tree(tree):
      """Flattens a nested structure to a list."""
      return tree_util.tree_flatten(tree)[0]
  
imports: import functools
  import jax
  from jax import lax
  from jax import random
  from jax import tree_util
  import jax.numpy
label_desc: Use image node_id 2 for calling a global function with example usage: flatten_tree(tree) and returns: tree_util