public Map<String, List<QueryHeaderRewriteRule>> getQueryParamRewriteRules() {
        return queryParamRewriteRules;
    }
@Test
    public void testQueryParamRewriteRules() {
        Assert.assertNotNull(routerConfig.getQueryParamRewriteRules());
        Assert.assertEquals(routerConfig.getQueryParamRewriteRules().size(), 4);
    }