description

# KeyRange.bound constructor Null safety

KeyRange.bound(

1. dynamic lower,
2. dynamic upper,
3. [bool lowerOpen = false,
4. bool upperOpen = false]

)

## Implementation

    factory KeyRange.bound(/*Key*/ lower, /*Key*/ upper,
            [bool lowerOpen = false, bool upperOpen = false]) =>
        _KeyRangeFactoryProvider.createKeyRange_bound(
            lower, upper, lowerOpen, upperOpen);