GeReV_HocrEditor/HocrEditor/Converters/NullableToBooleanConverter.cs
using System;
using System.Globalization;
using System.Windows.Data;

namespace HocrEditor.Converters;

public class NullableToBooleanConverter : IValueConverter
{
    public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
    {
        return value is not null;
    }

    public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
    {
        throw new NotSupportedException();
    }
}
