@Test
  void canInsertAbsoluteHref() {
    RequestTemplate template =
        new RequestTemplate().method(HttpMethod.GET).uri("/hostedzone/Z1PA6795UKMFR9");

    template.target("https://route53.amazonaws.com/2012-12-12");

    assertThat(template)
        .hasUrl("https://route53.amazonaws.com/2012-12-12/hostedzone/Z1PA6795UKMFR9");
  }
Avoid depending on guava solely for map literals.
core/src/test/java/feign/RequestTemplateTest.java