description

# addAll method Null safety

void addAll (

1. Iterable<E> iterable

)
override

Appends all objects of `iterable` to the end of this list.

Extends the length of the list by the number of objects in `iterable`. Throws an UnsupportedError if this list is fixed-length.

## Implementation

    void addAll(Iterable<E> iterable) {
      int i = this.length;
      for (E element in iterable) {
        assert(this.length == i || (throw ConcurrentModificationError(this)));
        add(element);
        i++;
      }
    }