return "Functions.toStringFunction()";
    }
  }

  /**
   * Returns the identity function.
   *
   * <p><b>Discouraged:</b> Prefer using a lambda like {@code v -> v}, which is shorter and often
   * more readable.
   */
  // implementation is "fully variant"; E has become a "pass-through" type
  @SuppressWarnings("unchecked")
  public static <E extends @Nullable Object> Function<E, E> identity() {

        Ticker.class,
        Joiner.class,
        Splitter.class,
        CharMatcher.class,
        InputStream.class,
        ByteArrayInputStream.class,
        Reader.class,
        Readable.class,
        StringReader.class,
        OutputStream.class,
        ByteArrayOutputStream.class,
        Writer.class,
        StringWriter.class,
        File.class,
        Buffer.class,

import org.codelibs.fess.opensearch.user.allcommon.EsAbstractEntity.RequestOptionCall;
import org.dbflute.Entity;
import org.dbflute.bhv.AbstractBehaviorWritable;
import org.dbflute.bhv.readable.EntityRowHandler;
import org.dbflute.bhv.writable.DeleteOption;
import org.dbflute.bhv.writable.InsertOption;
import org.dbflute.bhv.writable.UpdateOption;
import org.dbflute.cbean.ConditionBean;

          // io types
          .put(InputStream.class, new ByteArrayInputStream(new byte[0]))
          .put(ByteArrayInputStream.class, new ByteArrayInputStream(new byte[0]))
          .put(Readable.class, new StringReader(""))
          .put(Reader.class, new StringReader(""))
          .put(StringReader.class, new StringReader(""))
          .put(Buffer.class, ByteBuffer.allocate(0))

    assertEquals(-1, ArbitraryInstances.get(InputStream.class).read());
    assertEquals(-1, ArbitraryInstances.get(ByteArrayInputStream.class).read());
    assertEquals(-1, ArbitraryInstances.get(Readable.class).read(CharBuffer.allocate(1)));
    assertEquals(-1, ArbitraryInstances.get(Reader.class).read());
    assertEquals(-1, ArbitraryInstances.get(StringReader.class).read());

	// Copying and modifying a non-zero Buffer is prone to error,
	// but we cannot employ the noCopy trick used by WaitGroup and Mutex,
	// which causes vet's copylocks checker to report misuse, as vet
	// cannot reliably distinguish the zero and non-zero cases.
	// See #26462, #25907, #47276, #48398 for history.
}

// The readOp constants describe the last action performed on
// the buffer, so that UnreadRune and UnreadByte can check for

  }

  /**
   * Returns a supplier that always supplies {@code instance}.
   *
   * <p><b>Discouraged:</b> Prefer using {@code () -> instance}, but note that lambdas do not have
   * human-readable {@link #toString()} representations and are not serializable. If you need a
   * supplier that is serializable, use {@code (Supplier<T> & Serializable) () -> instance}.
   */

import org.codelibs.fess.opensearch.config.exentity.CrawlingInfo;
import org.codelibs.fess.opensearch.config.exentity.CrawlingInfoParam;
import org.codelibs.fess.util.ComponentUtil;
import org.dbflute.bhv.readable.EntityRowHandler;
import org.dbflute.cbean.result.ListResultBean;
import org.dbflute.cbean.result.PagingResultBean;
import org.dbflute.optional.OptionalEntity;

import com.orangesignal.csv.CsvConfig;

import org.codelibs.fess.util.GsaConfigParser;
import org.codelibs.fess.util.RenderDataUtil;
import org.codelibs.fess.util.ResourceUtil;
import org.codelibs.fess.util.SearchEngineUtil;
import org.dbflute.bhv.readable.EntityRowHandler;
import org.lastaflute.core.magic.async.AsyncManager;
import org.lastaflute.web.Execute;
import org.lastaflute.web.response.ActionResponse;
import org.lastaflute.web.response.HtmlResponse;

import org.codelibs.fess.opensearch.config.exentity.WebConfig;
import org.codelibs.fess.unit.UnitFessTestCase;
import org.codelibs.fess.util.ComponentUtil;
import org.dbflute.bhv.readable.CBCall;
import org.dbflute.cbean.result.ListResultBean;
import org.dbflute.optional.OptionalEntity;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.TestInfo;
import org.opensearch.index.query.QueryBuilder;