import org.codelibs.fess.crawler.exception.ChildUrlsException;
import org.codelibs.fess.crawler.exception.CrawlerSystemException;
import org.codelibs.fess.crawler.processor.ResponseProcessor;
import org.codelibs.fess.crawler.processor.impl.DefaultResponseProcessor;
import org.codelibs.fess.crawler.rule.Rule;
import org.codelibs.fess.crawler.rule.RuleManager;
import org.codelibs.fess.crawler.serializer.DataSerializer;

import org.codelibs.fess.crawler.service.DataService;
import org.codelibs.fess.crawler.service.UrlFilterService;
import org.codelibs.fess.crawler.service.UrlQueueService;
import org.codelibs.fess.crawler.service.impl.OpenSearchDataService;
import org.codelibs.fess.crawler.transformer.Transformer;
import org.codelibs.fess.crawler.util.OpenSearchResultList;
import org.codelibs.fess.exception.ContainerNotAvailableException;

        TF_RETURN_IF_ERROR(CopyGraph(
            &params->cond_graph->graph, &parent->graph, &parent->refiner,
            params->cond_inputs, inputs, scope.impl()->name(),
            scope.impl()->control_deps(), &params->cond_output,
            /* nreturn_nodes */ 1, &cond_output));
        *output = cond_output[0];
        return absl::OkStatus();
      };

   * Returns an {@link ImmutableSortedSet} containing the same values in the given domain
   * {@linkplain RangeSet#contains contained} by this range set.
   *
   * <p><b>Note:</b> {@code a.asSet(d).equals(b.asSet(d))} does not imply {@code a.equals(b)}! For
   * example, {@code a} and {@code b} could be {@code [2..4]} and {@code (1..5)}, or the empty
   * ranges {@code [3..3)} and {@code [4..4)}.
   *

* Instead ✨ **use `Union[SomeType, None]`** ✨.

Both are equivalent and underneath they are the same, but I would recommend `Union` instead of `Optional` because the word "**optional**" would seem to imply that the value is optional, and it actually means "it can be `None`", even if it's not optional and is still required.

I think `Union[SomeType, None]` is more explicit about what it means.

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.crawler.extractor.impl;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;

    ImmutableList<String> list =
        new ImmutableList.Builder<String>().add("a").add("b").add("a").add("c").build();
    assertEquals(asList("a", "b", "a", "c"), list);
  }

  @GwtIncompatible("Builder impl")
  public void testBuilderForceCopy() {
    ImmutableList.Builder<Integer> builder = ImmutableList.builder();
    Object[] prevArray = null;
    for (int i = 0; i < 10; i++) {
      builder.add(i);

import org.codelibs.fess.crawler.service.DataService;
import org.codelibs.fess.crawler.service.UrlFilterService;
import org.codelibs.fess.crawler.service.UrlQueueService;
import org.codelibs.fess.crawler.service.impl.OpenSearchDataService;
import org.codelibs.fess.crawler.transformer.Transformer;
import org.codelibs.fess.crawler.util.OpenSearchResultList;
import org.codelibs.fess.exception.ContainerNotAvailableException;

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.crawler.transformer.impl;

import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.MalformedURLException;
import java.net.URI;

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.crawler.service.impl;

import static org.opensearch.common.xcontent.XContentFactory.jsonBuilder;

import java.io.IOException;
import java.nio.charset.Charset;
import java.sql.Timestamp;
import java.text.ParseException;