CacheManager constructor Null safety

1. baguette
2. CacheManager
3. CacheManager
4. CacheManager constructor

CacheManager class

1. Constructors
2. CacheManager
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. addPlugin
8. cleanPlugins
9. getFile
10. getPlugin
11. noSuchMethod
12. removePlugin
13. toString
14. Operators
15. operator ==