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    This comment is hidden because it contains spoiler information about the solution

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    { one: '1',
      two: 2,
      three: false,
      four: {},
      another: '3',
      andit: [],
      andyou: [Function: andyou],
      whatabout: { andone: 'and another', andtwo: 2, andthree: 'and again' },
      lastkey: [ [ [Array], false ], 0 ] } 
    

    why this test expect 5 instead of 4??