GestureArenaTeam constructor Null safety

1. Flutter
2. gestures
3. GestureArenaTeam
4. GestureArenaTeam constructor

GestureArenaTeam class

1. Constructors
2. GestureArenaTeam
3. Properties
4. captain
5. hashCode
6. runtimeType
7. Methods
8. add
9. noSuchMethod
10. toString
11. Operators
12. operator ==