if (this.SetProperty(ref this._fontFamilyName, value.Source, nameof(this.FontFamilyName)))
set => RaiseAndSetIfChanged(ref this.tP, value);
set => this.RaiseAndSetIfChanged(ref this.display, value);
if (this.SetProperty(ref this._fontFamilyName, value.Source, nameof(this.FontFamilyName)))
set => RaiseAndSetIfChanged(ref this.tP, value);
set => this.RaiseAndSetIfChanged(ref this.display, value);