* 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 com.google.common.collect;

import static com.google.common.truth.Truth.assertThat;
import static java.lang.Long.MAX_VALUE;
import static java.lang.Thread.currentThread;
import static java.util.concurrent.Executors.newCachedThreadPool;

 * the License.
 */

package com.google.common.cache;

import com.google.common.annotations.GwtCompatible;
import com.google.common.collect.ImmutableMap;
import com.google.common.util.concurrent.ExecutionError;
import com.google.common.util.concurrent.UncheckedExecutionException;
import com.google.errorprone.annotations.CanIgnoreReturnValue;

 * limitations under the License.
 */

package com.google.common.io;

import static org.junit.Assert.assertThrows;

import com.google.common.base.Strings;
import com.google.common.collect.ImmutableList;
import java.io.EOFException;
import java.io.FilterReader;
import java.io.IOException;
import java.io.Reader;
import java.io.StringReader;
import java.io.StringWriter;
import java.io.Writer;

 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */

package com.google.common.collect;

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

import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;

 * 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 com.google.common.collect;

import static com.google.common.base.Preconditions.checkPositionIndexes;
import static java.lang.System.arraycopy;

import com.google.common.annotations.GwtCompatible;

 * 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 com.google.common.collect;

import static com.google.common.base.Predicates.not;
import static com.google.common.truth.Truth.assertThat;
import static org.junit.Assert.assertThrows;

import com.google.common.base.Predicate;

 * limitations under the License.
 */

package com.google.common.io;

import static org.junit.Assert.assertThrows;

import com.google.common.base.Strings;
import com.google.common.collect.ImmutableList;
import java.io.EOFException;
import java.io.FilterReader;
import java.io.IOException;
import java.io.Reader;
import java.io.StringReader;
import java.io.StringWriter;
import java.io.Writer;

**Priority: MEDIUM** | **Estimated Effort: 2-3 weeks**

Directory leasing extends the lease concept to directories for improved metadata caching.

#### 4.1 Core Directory Lease Infrastructure
```
Package: jcifs.internal.smb2.lease
├── DirectoryLeaseContext.java    - Directory-specific lease context
├── DirectoryLeaseCache.java      - Directory metadata cache
└── DirectoryChangeNotifier.java  - Directory change tracking

import org.apache.commons.io.FileUtils;
import org.codelibs.core.collection.Maps;
import org.codelibs.fess.unit.UnitFessTestCase;
import org.codelibs.sai.internal.ir.debug.ObjectSizeCalculator;

import com.google.common.collect.Lists;

public class MemoryUtilTest extends UnitFessTestCase {

    public void test_byteCountToDisplaySize() {
        assertEquals("0bytes", MemoryUtil.byteCountToDisplaySize(0L));

 * 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 com.google.common.collect;

import static java.util.Objects.requireNonNull;

import com.google.common.annotations.GwtIncompatible;
import com.google.errorprone.annotations.CanIgnoreReturnValue;
import java.util.Arrays;