protected override object ConvertFrom(TextValue value) => From(value);
protected override object ConvertFrom(TextValue value) { return(From(value)); }
protected override object ConvertFrom(TextValue value) { return(new MediaType(value)); }
protected override object ConvertFrom(TextValue value) { throw new NotImplementedException(); }
protected override object ConvertFrom(TextValue value) => From(value.ToString());
protected abstract object ConvertFrom(TextValue value);
protected override object ConvertFrom(TextValue value) => new LinkText(value);