WPF XAML trigger на datagridtextcolumn

public class BindingProxy : Freezable
    {
        public static readonly DependencyProperty DataProperty =
           DependencyProperty.Register("Data", typeof(object),
              typeof(BindingProxy));
 
        public object Data
        {
            get { return GetValue(DataProperty); }
            set { SetValue(DataProperty, value); }
        }
 
        #region Overrides of Freezable
 
        protected override Freezable CreateInstanceCore()
        {
            return new BindingProxy();
        }
 
        #endregion
    }

[ValueConversion(typeof(bool), typeof(Visibility))]
    public sealed class BooleanToVisibilityConverter : IValueConverter
    {
        public bool IsReversed { get; set; }
        public bool UseHidden { get; set; }
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            var val = System.Convert.ToBoolean(value, CultureInfo.InvariantCulture);
            if (this.IsReversed)
            {
                val = !val;
            }
            if (val)
            {
                return Visibility.Visible;
            }
            return this.UseHidden ? Visibility.Hidden : Visibility.Collapsed;
        }
        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }

private bool _firstItem;
public bool FirstItem
{
    get => _firstItem;
    set { _firstItem = value; OnPropertyChanged(); }
}
 
private bool _secondItem;
public bool SecondItem
{
    get => _secondItem;
    set { _secondItem= value; OnPropertyChanged(); }
}