1. Dart
2. dart:html
3. PaymentManager
4. userHint property

##### PaymentManager class

1. Properties
2. hashCode
3. instruments
4. runtimeType
5. userHint
6. Methods
7. noSuchMethod
8. toString
9. Operators
10. operator ==

description

# userHint property Null safety

String? userHint

## Implementation

    String? get userHint native;

void userHint= (String? value)

## Implementation

    set userHint(String? value) native;