LanguageUtils constructor Null safety

1. baguette
2. LanguageUtils
3. LanguageUtils
4. LanguageUtils constructor

LanguageUtils class

1. Constructors
2. LanguageUtils
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. noSuchMethod
8. toString
9. Operators
10. operator ==
11. Static methods
12. getLanguage
13. getLanguages
14. showLanguage