1. Dart
2. dart:html
3. PaymentInstruments
4. has method

##### PaymentInstruments class

1. Properties
2. hashCode
3. runtimeType
4. Methods
5. clear
6. delete
7. get
8. has
9. keys
10. noSuchMethod
11. set
12. toString
13. Operators
14. operator ==

description

# has method Null safety

Future has (

1. String instrumentKey

)

## Implementation

    Future has(String instrumentKey) =>
        promiseToFuture(JS("", "#.has(#)", this, instrumentKey));