addAll method Null safety
inherited
This operation is not supported by an unmodifiable list.
Implementation
void addAll(Iterable<E> iterable) {
throw new UnsupportedError("Cannot add to an unmodifiable list");
}
This operation is not supported by an unmodifiable list.
void addAll(Iterable<E> iterable) {
throw new UnsupportedError("Cannot add to an unmodifiable list");
}