Comparable<T> constructor Null safety

1. Dart
2. dart:core
3. Comparable<T>
4. Comparable constructor

Comparable class

1. Constructors
2. Comparable
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. compareTo
8. noSuchMethod
9. toString
10. Operators
11. operator ==
12. Static methods
13. compare