final Map<String, String> headerMap = new HashMap<>();
        provider.adjustActionResponseHeaders("application/xml", (k, v) -> headerMap.put(k, v));
        assertEquals(2, headerMap.size());
        assertEquals("def", headerMap.get("X-Def"));
        assertEquals("def2", headerMap.get("X-Def2"));
    }

    @Test

        "cache-control",
        "no-cache",
        "cache-control",
        "no-store",
        "user-agent",
        "OkHttp",
      )
    val headerMap = headers.toMultimap()
    assertThat(headerMap["cache-control"]!!.size).isEqualTo(2)
    assertThat(headerMap["user-agent"]!!.size).isEqualTo(1)
  }

  @Test fun toMultimapUsesCanonicalCase() {
    val headers =
      Headers.headersOf(
        "cache-control",

        sourceMap.put("searchField", searchFieldMap);
        final Map<String, List<String>> headerMap = headerList.stream()
                .collect(Collectors.groupingBy(Pair::getFirst, Collectors.mapping(Pair::getSecond, Collectors.toList())));
        sourceMap.put("headers", headerMap);
        sourceMap.put("documents", documentList);
        return sourceMap;
    }

    @Override

    #; overrideMap = map:{
    #    ; fess.freeGen.mail.targetDir = ./playsql/data/mail
    #}

    # you can adjust LastaDoc contents
    ; lastaDocContentsMap = map:{
        ; headerMap = map:{
            #; isSuppressSchemaHtmlLink = true
        }
        ; actionMap = map:{
            ; isSuppressDescriptionInList = true
            ; isSuppressAuthorInList = true
        }
    }
}