1. Dart
2. dart:core
3. UnimplementedError
4. UnimplementedError constructor

##### UnimplementedError class

1. Constructors
2. UnimplementedError
3. Properties
4. hashCode
5. message
6. runtimeType
7. stackTrace
8. Methods
9. noSuchMethod
10. toString
11. Operators
12. operator ==

description

# UnimplementedError constructor Null safety

UnimplementedError(

1. [String? message]

)

## Implementation

    UnimplementedError([this.message]);