import java.util.Collections;
import java.util.Set;
import org.jspecify.annotations.Nullable;

/** Implementation of an {@link Optional} not containing a reference. */
@GwtCompatible
final class Absent<T> extends Optional<T> {
  static final Absent<Object> INSTANCE = new Absent<>();

  @SuppressWarnings("unchecked") // implementation is "fully variant"
  static <T> Optional<T> withType() {
    return (Optional<T>) INSTANCE;
  }

     * Retrieves web crawling configurations with various filtering options.
     *
     * @param withLabelType whether to include label type information (currently not used in implementation)
     * @param withRoleType whether to include role type information (currently not used in implementation)
     * @param available whether to filter only available configurations
     * @param idList the list of configuration IDs to retrieve, or null for no ID filtering

        this.user = user;
    }

    // ===================================================================================
    //                                                                      Implementation
    //                                                                      ==============
    @Override
    public String getUserId() {
        return user.getName();
    }

import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.util.ComponentUtil;

import jakarta.annotation.PostConstruct;

/**
 * Standard transformer implementation for the Fess search engine.
 * This transformer handles document transformation and content extraction using
 * the standard Fess file transformation process with support for various content types.
 *

import jcifs.Configuration;
import jcifs.internal.SMBProtocolDecodingException;
import jcifs.internal.smb1.ServerMessageBlock;
import jcifs.internal.util.SMBUtil;

/**
 * SMB1 COM_SEEK command implementation.
 *
 * This command changes the current file position pointer for a file.
 * It allows seeking to different positions within an open file.
 *
 * @author mbechler
 */

import org.apache.maven.lifecycle.MavenExecutionPlan;
import org.apache.maven.model.Plugin;
import org.apache.maven.model.PluginExecution;
import org.apache.maven.plugin.MojoExecution;

/**
 * A stub implementation that assumes an empty lifecycle to bypass interaction with the plugin manager and to avoid
 * plugin artifact resolution from repositories.
 *
 */
@Deprecated

    public Set<V> get() {
      return EnumSet.noneOf(clazz);
    }
  }

  /**
   * An intermediate stage in a {@link MultimapBuilder} in which the key-value collection map
   * implementation has been specified, but the value collection implementation has not.
   *
   * @param <K0> The upper bound on the key type of the generated multimap.
   * @since 16.0
   */

    public Set<V> get() {
      return EnumSet.noneOf(clazz);
    }
  }

  /**
   * An intermediate stage in a {@link MultimapBuilder} in which the key-value collection map
   * implementation has been specified, but the value collection implementation has not.
   *
   * @param <K0> The upper bound on the key type of the generated multimap.
   * @since 16.0
   */

        } catch (RuntimeException e) {
            assertEquals("Load failed", e.getMessage());
        }

        assertEquals(1, chain.loadCalls.size());
    }

    // Test implementation state tracking
    public void test_implementation_stateTracking() {
        TestAuthenticationChain chain = new TestAuthenticationChain();
        User user1 = createTestUser("user1", "User One");

        block.uid = 0x1234;
        block.useUnicode = true;

        byte[] buf = new byte[256];
        int n = block.writeAndXWireFormat(buf, 0);

        assertTrue(n > 0);
        // Note: In actual implementation, uid is NOT propagated for non-AndX SMBs
        // uid is only set for AndXServerMessageBlock instances (line 167 in AndXServerMessageBlock.java)
        // Only useUnicode is set before the instanceof check (line 149)