W3cubDocs

/Dart 2

operator []= method

void operator []= (K key, V value)

This operation is not supported by an unmodifiable map.

Implementation

void operator []=(K key, V value) {
  throw new UnsupportedError("Cannot modify unmodifiable map");
}

© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/2.0.0/dart-collection/UnmodifiableMapBase/operator_put.html