Method checkElements

output/java_guava/1.4.16/Constraints.java:352–358

(Collection<E> elements, Constraint<? super E> constraint)

   */

  private static <E> Collection<E> checkElements(Collection<E> elements, Constraint<? super E> constraint) {
    Collection<E> copy = Lists.newArrayList(elements);
    for (E element : copy) {
      constraint.checkElement(element);
    }
    return copy;
  }
}