assertEquals(doc2, array[1]);

        @SuppressWarnings("unchecked")
        Map<String, Object>[] typedArray = qrList.toArray(new Map[0]);
        assertEquals(2, typedArray.length);
        assertEquals(doc1, typedArray[0]);
        assertEquals(doc2, typedArray[1]);
    }

    public void test_listOperations_removeAll_retainAll() {