### When Things are Difficult

When things are great, everything is easier, so that doesn't need much instructions. But when things are difficult, here are some guidelines.

            throw new FessSystemException("Could not find extractorFactory.");
        }
        Extractor extractor = extractorFactory.getExtractor(responseData.getMimeType());
        if (extractor == null) {
            extractor = ComponentUtil.getComponent("tikaExtractor");
            if (extractor == null) {
                throw new FessSystemException("Could not find tikaExtractor.");
            }
        }

    input_tensors->emplace_back(node, idx);

    const auto& iter = input_nodes->find(node);
    if (iter == input_nodes->end()) {
      input_nodes->insert({node, {idx}});
    } else {
      auto& indices = iter->second;
      if (std::find(indices.begin(), indices.end(), idx) != indices.end()) {
        return InvalidArgument("TF_Output ", node->name(), ":", idx,

        final Pattern attrPattern = Pattern.compile("\\s[^ ]+=\"([^\"]*)\"");
        while (matcher.find()) {
            final String tagStr = matcher.group();
            final Matcher attrMatcher = attrPattern.matcher(tagStr);
            final StringBuilder buf = new StringBuilder(100);
            while (attrMatcher.find()) {
                buf.append(attrMatcher.group(1)).append(' ');
            }

            :return: dict
            """
            root = STSElement.fromstring(
                'AssumeRoleWithClientGrantsResponse', data)
            result = root.find('AssumeRoleWithClientGrantsResult')
            creds = result.find('Credentials')
            return dict(
                access_key=creds.get_child_text('AccessKeyId'),
                secret_key=creds.get_child_text('SecretAccessKey'),

            return linkRenderer.link(new TypeMetaData(className), listener);
        }

        ClassMetaData targetClass;
        if (className != null) {
            targetClass = repository.find(className);
            if (targetClass == null) {
                return null;
            }
        } else {
            targetClass = classMetaData;
        }

        String methodSignature = matcher.group(3);

        for (int i = 0; i < 5; i++) {
            assertEquals(2, response.getNum());
            boolean find = false;
            final String checkStr = "クエリー" + i;
            for (int j = 0; j < 100; j++) {
                if (response.getWords().contains(checkStr)) {
                    find = true;
                    break;
                }

<img src="/img/tutorial/custom-response/image01.png">

## Available responses { #available-responses }

Here are some of the available responses.

Keep in mind that you can use `Response` to return anything else, or even create a custom sub-class.

/// note | Technical Details

You could also use `from starlette.responses import HTMLResponse`.

    assertEquals("cool", find(list, equalTo("cool"), "woot"));
    assertEquals("pants", find(list, equalTo("pants"), "woot"));
    assertEquals("woot", find(list, Predicates.alwaysFalse(), "woot"));
    assertThat(find(list, Predicates.alwaysFalse(), null)).isNull();
    assertEquals("cool", find(list, Predicates.alwaysTrue(), "woot"));
    assertCanIterateAgain(list);
  }

      incorporateRequirements(requirements, moreRequirements, testerAnnotation);
    }

    return requirements;
  }

  /**
   * Find all the tester annotations declared on a tester class or method.
   *
   * @param classOrMethod a class or method whose tester annotations to find
   * @return an iterable sequence of tester annotations on the class
   */