public string JumbotronTitle(JumbotronTitleSize jumbotronTitleSize) => null;
public override string JumbotronTitle(JumbotronTitleSize jumbotronTitleSize) => $"title is-{ToJumbotronTitleSize( jumbotronTitleSize )}";
public override string JumbotronTitle(JumbotronTitleSize jumbotronTitleSize) => $"e-title size-{ToJumbotronTitleSize( jumbotronTitleSize )}";
public override string JumbotronTitle(JumbotronTitleSize jumbotronTitleSize) => $"display-{ToJumbotronTitleSize( jumbotronTitleSize )}";
public abstract string JumbotronTitle(JumbotronTitleSize jumbotronTitleSize);