@Test void version5() {
    IndexTemplates template = storage.versionSpecificTemplates(V5_0);

    assertThat(template.version()).isEqualTo(V5_0);
    assertThat(template.autocomplete())
      .withFailMessage("In v5.x, the index_patterns field was named template")
      .contains("\"template\":");
    assertThat(template.autocomplete())
      .withFailMessage("Until v7.x, we delimited index and type with a colon")
      .contains("\"template\": \"zipkin:autocomplete-*\"");
  }
Unsupported, but we should test that parsing works
zipkin-storage/elasticsearch/src/test/java/zipkin2/elasticsearch/ElasticsearchSpecificTemplatesTest.java