Adds value
to the end of this list, extending the length by one.
Throws an UnsupportedError if the list is fixed-length.
void add(E value) { throw new UnsupportedError("Cannot add to immutable List."); }
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dart.dev/stable/2.5.0/dart-html/ImmutableListMixin/add.html