code: def test_getitem(fbdict):
      assert "foo" not in fbdict
      fbdict["foo"] = 23
      assert "foo" in fbdict
      assert fbdict["foo"] == 23
  
imports: import pytest
  from sacred.config.custom_containers import fallback_dict
label_desc: Use image node_id 3 for calling a global function with example usage: test_getitem(fbdict) without return types