Converter to change Grid.Column or Grid.Row utilizing FallbackValue (default value) and ConverterParameter (changed value)

BooleanToIntConverter.cs

public class BooleanToIntConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return ((value is true) && int.TryParse(parameter?.ToString(), out int buffer))
            ? buffer
            : DependencyProperty.UnsetValue;
    }

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

Grid.xaml

<Grid>
    <Grid.ColumnDefinitions>
        <ColumnDefinition/>
        <ColumnDefinition/>
    </Grid.ColumnDefinitions>

    <Rectangle Grid.Column="{Binding IsSwapped, Converter={StaticResource BooleanToIntConverterKey},
                             ConverterParameter=1, FallbackValue=0}"
               Width="200" Height="200"
               Fill="Red"/>

    <Rectangle Grid.Column="{Binding IsSwapped, Converter={StaticResource BooleanToIntConverterKey},
                             ConverterParameter=0, FallbackValue=1}"
               Width="200" Height="200"
               Fill="Blue"/>
</Grid>