SharedPrefThemeManager constructor Null safety

1. diginote
2. shared_preferences_theme_manager
3. SharedPrefThemeManager
4. SharedPrefThemeManager constructor

SharedPrefThemeManager class

1. Constructors
2. SharedPrefThemeManager
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. getBackgroundColour
8. getIsDarkMode
9. noSuchMethod
10. setBackgroundColour
11. setIsDarkMode
12. toString
13. Operators
14. operator ==
15. Constants
16. backgroundColourKey
17. defaultBackgroundColour
18. defaultIsDarkMode
19. isDarkModeKey