Method addAll

output/java_guava/1.4.17/Iterators.java:378–387

Adds all elements in iterator to collection. The iterator will be left exhausted: its hasNext() method will return false. @return true if collection was modified as a result of this operation

(Collection<T> addTo, Iterator<? extends T> iterator)

   */

  @CanIgnoreReturnValue
  public static <T> boolean addAll(Collection<T> addTo, Iterator<? extends T> iterator) {
    checkNotNull(addTo);
    checkNotNull(iterator);
    boolean wasModified = false;
    while (iterator.hasNext()) {
      wasModified |= addTo.add(iterator.next());
    }
    return wasModified;
  }

  /**
   * Returns the number of elements in the specified iterator that equal the