code: def test_fallback(fbdict):
      assert "fall1" in fbdict
      assert fbdict["fall1"] == 7
      fbdict["fall1"] = 8
      assert fbdict["fall1"] == 8
  
imports: import pytest
  from sacred.config.custom_containers import fallback_dict
label_desc: Use image node_id 4 for calling a global function with example usage: test_fallback(fbdict) without return types