}
      }
    }

    return transitiveClosure.build();
  }

  /**
   * Returns the set of nodes that are reachable from {@code node}. Node B is defined as reachable
   * from node A if there exists a path (a sequence of adjacent outgoing edges) starting at node A
   * and ending at node B. Note that a node is always reachable from itself via a zero-length path.
   *

      multimap.put(elements[i], i);
    }
  }

  /**
   * Implements {@code Multimap.put()} -- and no other methods -- for a {@code Map} by ignoring all
   * but the latest value for each key. This class exists only so that we can use {@link
   * MultimapsCollectionTest#populateMultimapForGet(Multimap, String[])} and similar methods to
   * populate a map to be passed to {@link Multimaps#forMap(Map)}. All tests should run against the

   * iterator containing two inner lists of three elements each, all in the original order.
   *
   * <p>The returned lists implement {@link java.util.RandomAccess}.
   *
   * @param iterator the iterator to return a partitioned view of
   * @param size the desired size of each partition
   * @return an iterator of immutable lists containing the elements of {@code iterator} divided into