* underlying multimap, and vice versa. The map does not support {@code put} or {@code putAll},
   * nor do its entries support {@link Entry#setValue setValue}.
   */
  Map<K, Collection<V>> asMap();

  // Comparison and hashing

  /**
   * Compares the specified object with this multimap for equality. Two multimaps are equal when

            key = this.connection.getHeaderFieldKey(i);
            value = this.connection.getHeaderField(i);
        }
        for (final Entry<String, List<String>> entry : map.entrySet()) {
            entry.setValue(Collections.unmodifiableList(entry.getValue()));
        }
        return this.headerFields = Collections.unmodifiableMap(map);
    }

    @Override
    public Map<String, List<String>> getHeaderFields() {

    assertThrows(UnsupportedOperationException.class, () -> map.putAll(ImmutableMap.of("b", "2")));

    assertThrows(
        UnsupportedOperationException.class,
        () -> map.entrySet().iterator().next().setValue("one"));
  }

  public void testTransformRemoveEntry() {
    Map<String, Integer> underlying = new HashMap<>();
    underlying.put("a", 1);

        Properties props = new Properties();
        props.put("key", "${env.testKey}");
        Xpp3Dom configurationChild = new Xpp3Dom("jdkHome");
        configurationChild.setValue("${env.testKey}");
        Xpp3Dom configuration = new Xpp3Dom("configuration");
        configuration.addChild(configurationChild);
        ToolchainModel toolchain = new ToolchainModel();
        toolchain.setType("TYPE");

    assertThrows(UnsupportedOperationException.class, () -> map.putAll(ImmutableMap.of("b", "2")));

    assertThrows(
        UnsupportedOperationException.class,
        () -> map.entrySet().iterator().next().setValue("one"));
  }

  public void testTransformRemoveEntry() {
    Map<String, Integer> underlying = new HashMap<>();
    underlying.put("a", 1);

        } catch (final Throwable t) {
            throw new IllegalPropertyRuntimeException(beanDesc.getBeanClass(), propertyName, t);
        }
    }

    @Override
    public void setValue(final Object target, final Object value) {
        assertArgumentNotNull("target", target);

        try {
            final Object convertedValue = convertIfNeed(value);

    assertThrows(UnsupportedOperationException.class, () -> map.putAll(ImmutableMap.of("b", "2")));

    assertThrows(
        UnsupportedOperationException.class,
        () -> map.entrySet().iterator().next().setValue("one"));
  }

  public void testTransformRemoveEntry() {
    Map<String, Integer> underlying = new HashMap<>();
    underlying.put("a", 1);

                        if (interpolated != null && !interpolated.equals(value)) {
                            try {
                                entry.setValue(interpolated);
                            } catch (UnsupportedOperationException ignore) {
                                // nop
                            }
                        }

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

        infoMap = null;
    }

import org.codelibs.core.beans.util.CopyOptions;

// Bean metadata introspection
BeanDesc beanDesc = BeanDescFactory.getBeanDesc(MyBean.class);
PropertyDesc nameProperty = beanDesc.getPropertyDesc("name");
nameProperty.setValue(bean, "John Doe");

// Bean copying with flexible options
BeanUtil.copyBeanToBean(source, destination);
BeanUtil.copyBeanToBean(source, destination, options -> 
    options.exclude("password", "internalId"));