public static bool IsNullOrEmpty(this NaturalString s) => string.IsNullOrEmpty(s);
public static bool IsNullOrWhitespace(this NaturalString s) => string.IsNullOrWhiteSpace(s);
public static bool IsNullOrEmpty(this NaturalString s) => string.IsNullOrEmpty(s);
public static bool IsNullOrWhitespace(this NaturalString s) => string.IsNullOrWhiteSpace(s);