public String asPairsWithComment(String comment) {
        return new PropertiesWriter(pairs).writeString(comment);
    }
@Test
    public void pairsWithMultineComment() {
        assertThat(new OrderedProperties().asPairsWithComment("this\nis\n\ra\rcomment\\"),
                is("# this\n" +
                        "# is\n" +
                        "# a\n" +
                        "# comment\\\n"));
    }