throw new UnsupportedOperationException();
    }
  }

  /*
   * TODO(cpovirk): surely we can find a less ugly solution than a class that accepts 3 parameters,
   * exposes as many getters, does work in the constructor, and has both a superclass and a subclass
   */
  public static class SortedMapSubmapTestMapGenerator<
          K extends @Nullable Object, V extends @Nullable Object>

      this.delegate = checkNotNull(delegate);
    }

    @Override
    @ParametricNullness
    public T get() {
      // Because Supplier is read-heavy, we use the "double-checked locking" pattern.
      if (delegate != null) {
        synchronized (lock) {
          if (delegate != null) {
            T t = delegate.get();
            value = t;
            delegate = null;
            return t;

      <name>PatternSet</name>
      <version>3.0.0+</version>
      <description>Definition of include or exclude patterns.</description>
      <fields>
        <field>
          <name>includes</name>
          <version>3.0.0+</version>
          <description>
            A list of patterns to include, e.g. {@code **&amp;#47;*.xml}.
          </description>
          <association>
            <type>String</type>

constraints.Min.message = {item} must be greater than or equal to {value}.
constraints.NotNull.message = {item} is required.
constraints.Null.message = {item} must be null.
constraints.Past.message = {item} must be a past value.
constraints.Pattern.message = {item} does not match "{regexp}".
constraints.Size.message = The size of {item} must be between {min} and {max}.
# ----------------------------------------------------------
# Hibernate Validator
# -------------------

constraints.Min.message = {item} must be greater than or equal to {value}.
constraints.NotNull.message = {item} is required.
constraints.Null.message = {item} must be null.
constraints.Past.message = {item} must be a past value.
constraints.Pattern.message = {item} does not match "{regexp}".
constraints.Size.message = The size of {item} must be between {min} and {max}.
# ----------------------------------------------------------
# Hibernate Validator
# -------------------

  public static class GoodEqualsFactory {
    public static Object good(
        String a,
        int b,
        // oneConstantOnly doesn't matter since it's not nullable and can be only 1 value.
        @SuppressWarnings("unused") OneConstantEnum oneConstantOnly,
        // noConstant doesn't matter since it can only be null
        @SuppressWarnings("unused") @Nullable NoConstantEnum noConstant) {
      return new GoodEquals(a, b);
    }

      this.delegate = checkNotNull(delegate);
    }

    @Override
    @ParametricNullness
    public T get() {
      // Because Supplier is read-heavy, we use the "double-checked locking" pattern.
      if (delegate != null) {
        synchronized (lock) {
          if (delegate != null) {
            T t = delegate.get();
            value = t;
            delegate = null;
            return t;

    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    min-height: 0;
    position: relative;
}

/* ============================================
   Empty State (ADS pattern)
   ============================================ */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 2rem;

        assertEquals("{constraints.Null.message}", FessMessages.CONSTRAINTS_Null_MESSAGE);
        assertEquals("{constraints.Past.message}", FessMessages.CONSTRAINTS_Past_MESSAGE);
        assertEquals("{constraints.Pattern.message}", FessMessages.CONSTRAINTS_Pattern_MESSAGE);
        assertEquals("{constraints.Size.message}", FessMessages.CONSTRAINTS_Size_MESSAGE);

    private final AtomicLong leaseBreaks = new AtomicLong();
    private final AtomicLong leaseUpgrades = new AtomicLong();
    private final AtomicLong leaseDowngrades = new AtomicLong();
    
    // Getters and increment methods
}
```

## 12. Future Enhancements

1. **Directory Leases**: Extend lease support for directories
2. **Lease Key Persistence**: Save lease keys for reconnection