pt property Null safety

1. flutter_baidu_mapapi_search
2. flutter_baidu_mapapi_search
3. BMFPOIDetailChildrenInfo
4. pt property

BMFPOIDetailChildrenInfo class

1. Constructors
2. BMFPOIDetailChildrenInfo
3. fromMap
4. Properties
5. address
6. hashCode
7. name
8. pt
9. runtimeType
10. showName
11. tag
12. uid
13. Methods
14. fromMap
15. noSuchMethod
16. toMap
17. toString
18. Operators
19. operator ==