SliverLogicalParentData constructor Null safety

1. Flutter
2. rendering
3. SliverLogicalParentData
4. SliverLogicalParentData constructor

SliverLogicalParentData class

1. Constructors
2. SliverLogicalParentData
3. Properties
4. hashCode
5. layoutOffset
6. runtimeType
7. Methods
8. detach
9. noSuchMethod
10. toString
11. Operators
12. operator ==