putIfAbsent method
- K key,
- V ifAbsent( )
inherited
This operation is not supported by an unmodifiable map.
Implementation
V putIfAbsent(K key, V ifAbsent()) { throw UnsupportedError("Cannot modify unmodifiable map"); }
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dart.dev/stable/2.13.0/dart-collection/UnmodifiableMapView/putIfAbsent.html