# followedBy method

Iterable<E> followedBy (Iterable<E> other)

Returns the lazy concatentation of this iterable and `other`.

The returned iterable will provide the same elements as this iterable, and, after that, the elements of `other`, in the same order as in the original iterables.

## Implementation

    Iterable<E> followedBy(Iterable<E> other) {
      // Type workaround because IterableMixin<E> doesn't promote
      // to EfficientLengthIterable<E>.
      Iterable<E> self = this;
      if (self is EfficientLengthIterable<E>) {
        return new FollowedByIterable<E>.firstEfficient(self, other);
      }
      return new FollowedByIterable<E>(this, other);
    }