code: def test_showversions(capsys):
      import tslumen
  
      tslumen.show_versions()
      captured = capsys.readouterr().out
      for l in tslumen.CORE_DEPENDENCIES:
          assert l in captured
  
imports: import mock
  from pkg_resources import DistributionNotFound
  from importlib import reload
label_desc: Use image node_id 3 for calling a global function with example usage: test_showversions(capsys) without return types