code: def test_flatten_nodes_in_containers():
      # see issue #232
      def f(x, y):
          xy, _ = flatten([x, y])
          return np.sum(xy)
  
      grad(f)(1.0, 2.0)
  
file_path: autograd/tests/test_misc.py
imports: import autograd.numpy
  import autograd.numpy.random
  from autograd.test_util import scalar_close
  from autograd import make_vjp, grad
  from autograd.tracer import primitive
  from autograd.misc import const_graph, flatten
label_desc: Use image node_id 7 for calling a global function with example usage: test_flatten_nodes_in_containers() and returns: np