public static void Add()
    {
        var style1 = new CSharpStyleExpressionBodiedMethodsStyle(new ExpressionBodiedData(9u, 2u, 3u, 4u));
        var style2 = new CSharpStyleExpressionBodiedMethodsStyle(new ExpressionBodiedData(90u, 20u, 30u, 40u));
        var style3 = style1.Add(style2);

        var data = style3.Data;

        Assert.That(data.TotalOccurences, Is.EqualTo(99u), nameof(data.TotalOccurences));
        Assert.That(data.ArrowSingleLineOccurences, Is.EqualTo(22u), nameof(data.ArrowSingleLineOccurences));
        Assert.That(data.ArrowMultiLineOccurences, Is.EqualTo(33u), nameof(data.ArrowMultiLineOccurences));
        Assert.That(data.BlockOccurences, Is.EqualTo(44u), nameof(data.BlockOccurences));
    }