// Test & Verify
    verifyMergeSorted(iterables, ImmutableList.<Integer>of());
  }

  public void testMergeSorted_single() {
    // Setup
    Iterable<Integer> iterable0 = ImmutableList.of(1, 2, 3);
    Iterable<Iterable<Integer>> iterables = ImmutableList.of(iterable0);

    // Test & Verify
    verifyMergeSorted(iterables, iterable0);
  }