description

# followedBy method Null safety

Iterable<E> followedBy (

1. 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) {
      var self = this; // TODO(lrn): Remove when we can promote `this`.
      if (self is EfficientLengthIterable<E>) {
        return FollowedByIterable<E>.firstEfficient(self, other);
      }
      return FollowedByIterable<E>(this, other);
    }