code: @SafeVarargs
    public static <T> Iterable<T> concat(Iterable<? extends T>... inputs) {
      return FluentIterable.concat(inputs);
    }
docs: Combines multiple iterables into a single iterable. The returned iterable has an iterator that
  traverses the elements of each iterable in {@code inputs}. The input iterators are not polled
  until necessary.
  
  <p>The returned iterable's iterator supports {@code remove()} when the corresponding input
  iterator supports it.
  
  <p><b>Java 8 users:</b> The {@code Stream} equivalent of this method is {@code
  Streams.concat(...)}.
  
  @throws NullPointerException if any of the provided iterables is null