}

  /**
   * A sensible implementation of {@link Map#values} in terms of the following methods: {@link
   * ForwardingMap#clear}, {@link ForwardingMap#containsValue}, {@link ForwardingMap#isEmpty},
   * {@link ForwardingMap#size}, and the {@link Set#iterator} method of {@link
   * ForwardingMap#entrySet}. In many cases, you may wish to override {@link ForwardingMap#values}

        return new ConcurrentSkipListMap<>();
    }

    /**
     * {@link ConcurrentSkipListMap}の新しいインスタンスを作成して返します。
     *
     * @param <K>
     *            {@link ConcurrentSkipListMap}のキーの型
     * @param <V>
     *            {@link ConcurrentSkipListMap}の値の型
     * @param c
     *            {@link Comparator}
     * @return {@link ConcurrentSkipListMap}の新しいインスタンス

     * @return {@link PropertyDesc}
     */
    PropertyDesc getPropertyDesc(String propertyName);

    /**
     * {@link PropertyDesc}を返します。
     *
     * @param index
     *            {@link PropertyDesc}のインデックス
     * @return {@link PropertyDesc}
     */
    PropertyDesc getPropertyDesc(int index);

    /**
     * {@link PropertyDesc}の数を返します。
     *
     * @return {@link PropertyDesc}の数
     */

        def link = new File(tmpDir.getTestDirectory(), "link")

        when:
        createSymbolicLink(link, originalFile)

        then:
        link.exists()

        when:
        boolean didWork = delete(followSymlinks, link)

        then:
        !link.exists()
        originalFile.assertExists()
        didWork

        cleanup:
        link.delete()

        where:

 *   <li>{@link Collections2}
 *   <li>{@link Comparators}
 *   <li>{@link Iterables}
 *   <li>{@link Iterators}
 *   <li>{@link Lists}
 *   <li>{@link Maps}
 *   <li>{@link MoreCollectors}
 *   <li>{@link Multimaps}
 *   <li>{@link Multisets}
 *   <li>{@link ObjectArrays}
 *   <li>{@link Queues}
 *   <li>{@link Sets}
 *   <li>{@link Streams}
 *   <li>{@link Tables}
 * </ul>
 *
 * <h2>Abstract implementations</h2>
 *

 *   <li>{@link Collections2}
 *   <li>{@link Comparators}
 *   <li>{@link Iterables}
 *   <li>{@link Iterators}
 *   <li>{@link Lists}
 *   <li>{@link Maps}
 *   <li>{@link MoreCollectors}
 *   <li>{@link Multimaps}
 *   <li>{@link Multisets}
 *   <li>{@link ObjectArrays}
 *   <li>{@link Queues}
 *   <li>{@link Sets}
 *   <li>{@link Streams}
 *   <li>{@link Tables}
 * </ul>
 *
 * <h2>Abstract implementations</h2>
 *

            <link>http://jakarta.apache.org/commons/logging/apidocs/</link>
            <link>http://jakarta.apache.org/commons/pool/apidocs/</link>
            <link>http://www.junit.org/junit/javadoc/</link>
            <link>http://logging.apache.org/log4j/docs/api/</link>
            <link>http://jakarta.apache.org/regexp/apidocs/</link>
            <link>http://jakarta.apache.org/velocity/api/</link>
          </links>
        </configuration>

@ElementTypesAreNonnullByDefault
public enum RemovalCause {
  /**
   * The entry was manually removed by the user. This can result from the user invoking {@link
   * Cache#invalidate}, {@link Cache#invalidateAll(Iterable)}, {@link Cache#invalidateAll()}, {@link
   * Map#remove}, {@link ConcurrentMap#remove}, or {@link Iterator#remove}.
   */
  EXPLICIT {
    @Override
    boolean wasEvicted() {
      return false;
    }
  },

  /**

            <link>http://jakarta.apache.org/commons/logging/apidocs/</link>
            <link>http://jakarta.apache.org/commons/pool/apidocs/</link>
            <link>http://www.junit.org/junit/javadoc/</link>
            <link>http://logging.apache.org/log4j/docs/api/</link>
            <link>http://jakarta.apache.org/regexp/apidocs/</link>
            <link>http://jakarta.apache.org/velocity/api/</link>
          </links>
        </configuration>

 *
 * <ul>
 *   <li>{@link ImmutableDoubleArray}
 *   <li>{@link ImmutableIntArray}
 *   <li>{@link ImmutableLongrray}
 *   <li>{@link UnsignedInteger}
 *   <li>{@link UnsignedLong}
 * </ul>
 *
 * <h3>Per-type static utilities</h3>
 *
 * <ul>
 *   <li>{@link Booleans}
 *   <li>{@link Bytes}
 *       <ul>
 *         <li>{@link SignedBytes}
 *         <li>{@link UnsignedBytes}
 *       </ul>