dart / 2 / dart-collection / unmodifiablemapbase / operator_put.html

operator []= method

void operator []=(
  1. K key,
  2. V value
)
inherited

This operation is not supported by an unmodifiable map.

Implementation

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

© 2012 the Dart project authors
Licensed under the BSD 3-Clause "New" or "Revised" License.
https://api.dart.dev/stable/2.18.5/dart-collection/UnmodifiableMapBase/operator_put.html