ICacheManager constructor Null safety

1. baguette
2. ICacheManager
3. ICacheManager
4. ICacheManager constructor

ICacheManager class

1. Constructors
2. ICacheManager
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 ==