code: def test_workingmemory_layer():
      from nnabla.utils.load import load
  
      with create_temp_with_dir("network.nntxt") as fn:
          with open(fn, "w") as f:
              f.write(nntxt_mixup)
          load(fn)
  
imports: import pytest
  import nnabla
  from helper import create_temp_with_dir
  from nnabla.utils import nnp_graph
label_desc: Use image node_id 2 for calling a global function with example usage: test_workingmemory_layer() without return types