public void testPutDuplicateValue() {
    List<Entry<K, V>> entries = copyToList(multimap().entries());

    for (Entry<K, V> entry : entries) {
      resetContainer();

      K k = entry.getKey();
      V v = entry.getValue();

      List<V> values = multimap().get(k);
      List<V> expectedValues = copyToList(values);

      assertTrue(multimap().put(k, v));
      expectedValues.add(v);
      assertGet(k, expectedValues);

    for (Entry<String, String> entry : TEST_STRINGS.entrySet()) {
      if (testAsCharSource) {
        suite.addTest(suiteForString(factory, entry.getValue(), name, entry.getKey()));
      } else {
        suite.addTest(
            suiteForBytes(factory, entry.getValue().getBytes(UTF_8), name, entry.getKey(), true));
      }
    }
    return suite;
  }

  static TestSuite suiteForString(

        final CrawlingInfoParam param = new CrawlingInfoParam();
        assertNull(param.getId());
        assertNull(param.getCrawlingInfoId());
        assertNull(param.getKey());
        assertNull(param.getValue());
        assertNull(param.getCreatedTime());

        param.setId("param-id");
        param.setCrawlingInfoId("crawling-info-id");
        param.setKey("docs_processed");
        param.setValue("1000");

            final String key = entry.getKey();
            if (key.startsWith(CRAWLER_PARAM_PREFIX)) {
                factoryParamMap.put(key.substring(CRAWLER_PARAM_PREFIX.length()), entry.getValue());
            }
        }

        // user agent
        final String userAgent = paramMap.get(CRAWLER_USERAGENT);
        if (StringUtil.isNotBlank(userAgent)) {

            if (fieldConfigs.getConfig(e.getKey()).map(FieldConfigs.Config::isOverwrite).orElse(false)
                    && e.getValue() instanceof final Object[] values && values.length > 0) {
                newDataMap.put(e.getKey(), values[values.length - 1]);
            } else {
                newDataMap.put(e.getKey(), e.getValue());
            }
        }
        return newDataMap;
    }

                crawlingInfoParam.setCrawlingInfoId(crawlingInfo.getId());
                crawlingInfoParam.setKey(entry.getKey());
                crawlingInfoParam.setValue(entry.getValue());
                crawlingInfoParamList.add(crawlingInfoParam);
            }
            getCrawlingInfoService().storeInfo(crawlingInfoParamList);
        }

        infoMap = null;
    }

                final StringBuilder tempBuf = new StringBuilder();
                append(tempBuf, StringEscapeUtils.escapeJson(e.getKey()), () -> StringEscapeUtils.escapeJson(e.getValue().getHotThreads()));
                return tempBuf.toString();
            }).collect(Collectors.joining(","));
            buf.append(hotThreads).append(',');
        } catch (final Exception e) {

    return new AbstractIterator<E>() {
      @Override
      protected @Nullable E computeNext() {
        while (entries.hasNext()) {
          Entry<E, ?> entry = entries.next();
          if (targetNode.equals(entry.getValue())) {
            return entry.getKey();
          }
        }
        return endOfData();
      }
    };
  }

  @Override
  public boolean contains(@Nullable Object edge) {

      for (Object element : elements) {
        @SuppressWarnings("unchecked")
        Entry<String, Integer> entry = (Entry<String, Integer>) element;
        multimap.put(entry.getKey(), entry.getValue());
      }
      return multimap.entries();
    }

    abstract Multimap<String, Integer> createMultimap();

    @Override
    @SuppressWarnings("unchecked")

  }

  private String expectedToString(Set<Entry<K, V>> entries) {
    Map<K, V> reference = new LinkedHashMap<>();
    for (Entry<K, V> entry : entries) {
      reference.put(entry.getKey(), entry.getValue());
    }
    return reference.toString();
  }