PointerSignalResolver constructor Null safety

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

PointerSignalResolver class

1. Constructors
2. PointerSignalResolver
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. noSuchMethod
8. register
9. resolve
10. toString
11. Operators
12. operator ==