Schedule constructor Null safety

1. univalle_app
2. models
3. Schedule
4. Schedule const constructor

Schedule class

1. Constructors
2. Schedule
3. Properties
4. hashCode
5. nextClass
6. props
7. runtimeType
8. scheduleMap
9. stringify
10. Methods
11. getDaySchedule
12. noSuchMethod
13. toString
14. Operators
15. operator ==
16. Constants
17. empty