1. Dart
2. dart:indexed_db
3. KeyRange
4. includes method

##### KeyRange class

1. Constructors
2. bound
3. lowerBound
4. only
5. upperBound
6. Properties
7. hashCode
8. lower
9. lowerOpen
10. runtimeType
11. upper
12. upperOpen
13. Methods
14. includes
15. noSuchMethod
16. toString
17. Operators
18. operator ==
19. Static methods
20. bound_
21. lowerBound_
22. only_
23. upperBound_

description

# includes method Null safety

bool includes (

1. Object key

)

## Implementation

    bool includes(Object key) native;