sort method

void sort([Comparator<E> compare ])

This operation is not supported by an unmodifiable list.

Source

void sort([Comparator<E> compare]) {
  throw new UnsupportedError("Cannot modify an unmodifiable list");
}

© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/1.24.3/dart-collection/UnmodifiableListView/sort.html