*     {@code null}) and returns {@code Optional.empty()} if it has none.
   */
  @SuppressWarnings("unchecked")
  public static <T> Collector<T, ?, Optional<T>> toOptional() {
    return (Collector) TO_OPTIONAL;
  }

  private static final Object NULL_PLACEHOLDER = new Object();

  private static final Collector<@Nullable Object, ?, @Nullable Object> ONLY_ELEMENT =
      Collector.<@Nullable Object, ToOptionalState, @Nullable Object>of(

    private static final int CACHE_POLICY =
                Config.getInt( "jcifs.smb1.netbios.cachePolicy", 60 * 10 ) * 60; /* 10 hours */

    static NbtAddress[] dc_list = null;
    static long dc_list_expiration;
    static int dc_list_counter;

    private static NtlmChallenge interrogate( NbtAddress addr ) throws SmbException {
        UniAddress dc = new UniAddress( addr );

        void apply(Ansi ansi);
    }

    public static boolean isEnabled() {
        return org.apache.maven.jline.MessageUtils.isColorEnabled() && org.jline.jansi.Ansi.isEnabled();
    }

    public static void setEnabled(final boolean flag) {
        org.jline.jansi.Ansi.setEnabled(flag);
    }

    public static Ansi ansi() {
        if (isEnabled()) {
            return new Ansi();

    /**
     * 
     */
    public static final byte FILE_ENDOFFILE_INFO = 20;

    /**
     * 
     */
    public static final byte FILE_BASIC_INFO = 0x4;
    /**
     * 
     */
    public static final byte FILE_STANDARD_INFO = 0x5;

    /**
     * 
     */
    public static final byte FILE_INTERNAL_INFO = 0x6;

    /**
     * 
     */
    public static final byte FILE_RENAME_INFO = 10;

import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertSame;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;

/**

package com.google.common.collect.testing.testers;

import static com.google.common.collect.testing.features.CollectionFeature.KNOWN_ORDER;
import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_REMOVE;
import static com.google.common.collect.testing.features.CollectionSize.ONE;
import static com.google.common.collect.testing.features.CollectionSize.SEVERAL;
import static com.google.common.collect.testing.features.CollectionSize.ZERO;

 * governing permissions and limitations under the License.
 */
package org.codelibs.core.beans.impl;

import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.CoreMatchers.notNullValue;
import static org.hamcrest.CoreMatchers.nullValue;
import static org.hamcrest.CoreMatchers.sameInstance;
import static org.junit.Assert.assertThat;

import java.lang.reflect.Constructor;

import org.codelibs.core.beans.BeanDesc;

     */
    public static boolean consumerPom(@Nullable Session session) {
        return consumerPom(session != null ? session.getUserProperties() : null);
    }

    private static boolean doGet(Properties userProperties, String key, boolean def) {
        return doGet(userProperties != null ? userProperties.get(key) : null, def);
    }

 */
package org.codelibs.core.beans.factory;

import static org.codelibs.core.collection.ArrayIterator.iterable;
import static org.codelibs.core.collection.IndexedIterator.indexed;
import static org.codelibs.core.lang.GenericsUtil.getActualClass;
import static org.codelibs.core.lang.GenericsUtil.getGenericParameters;
import static org.codelibs.core.lang.GenericsUtil.getTypeVariableMap;
import static org.codelibs.core.misc.AssertionUtil.assertArgumentArrayIndex;

 * the License.
 */

package com.google.common.hash;

import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Preconditions.checkState;

import com.google.errorprone.annotations.Immutable;
import java.io.InvalidObjectException;