* they are thin wrapper around {@link java.util.Collections#emptySet()}, {@link
 * Collections#singleton(Object)} and {@link java.util.LinkedHashSet} for empty, singleton and
 * regular sets respectively. For the sorted sets, it's a thin wrapper around {@link
 * java.util.TreeSet}.
 *
 * @see ImmutableSortedSet
 * @author Hayward Chan
 */
@SuppressWarnings("serial") // Serialization only done in GWT.

        // Clean up temp files
        if (tempOutputFile != null && tempOutputFile.exists()) {
            tempOutputFile.delete();
        }
        if (tempDir != null) {
            Files.walk(tempDir).sorted((a, b) -> b.compareTo(a)).forEach(path -> {
                try {
                    Files.delete(path);
                } catch (IOException e) {
                    // Ignore cleanup errors
                }

    }

    @GwtIncompatible @J2ktIncompatible private static final long serialVersionUID = 0;
  }

  /**
   * Returns an unmodifiable view of the specified row-sorted table. This method allows modules to
   * provide users with "read-only" access to internal tables. Query operations on the returned
   * table "read through" to the specified table, and attempts to modify the returned table, whether

     * order in which entries were inserted into the builder, unless {@link #orderEntriesByValue}
     * was called, in which case entries are sorted by value.
     *
     * <p>Prefer the equivalent method {@link #buildOrThrow()} to make it explicit that the method
     * will throw an exception if there are duplicate keys or values. The {@code build()} method

        String[] keys = entrySet.stream().map(Map.Entry::getKey).toArray(String[]::new);

        boolean langFirst = "lang".equals(keys[0]);
        assertTrue("lang should be first or sorted normally", langFirst || Arrays.asList(keys).contains("lang"));

        assertTrue(Arrays.asList(keys).contains("apple"));
        assertTrue(Arrays.asList(keys).contains("banana"));

    tree.put(1.0, 2.0);
    tree.put(2.0, 3.0);
    tree.put(3.0, 4.0);
    tree.put(4.0, 5.0);

    SortedSetMultimap<Double, Double> sorted = Multimaps.unmodifiableSortedSetMultimap(tree);
    TreeMultimap<Double, Double> copyFromSorted = TreeMultimap.create(sorted);
    assertEquals(tree, copyFromSorted);
    assertSame(Ordering.natural(), copyFromSorted.keyComparator());

    public Collection<Object> values() {
        return parent.values();
    }

    /**
     * Returns a Set view of the mappings contained in this map.
     * If the map contains a language key, it will be sorted to appear first.
     *
     * @return a set view of the mappings contained in this map with language key prioritized
     */
    @Override
    public Set<java.util.Map.Entry<String, Object>> entrySet() {

            deleteDirectory(tempDir);
        }
        super.tearDown();
    }

    private void deleteDirectory(Path dir) throws IOException {
        Files.walk(dir).sorted((a, b) -> b.compareTo(a)).forEach(path -> {
            try {
                Files.delete(path);
            } catch (IOException e) {
                // Ignore
            }
        });
    }

  }

  /**
   * Holding the lock of the connection being added or removed when mutating this, and check its
   * [RealConnection.noNewExchanges] property. This defends against races where a connection is
   * simultaneously adopted and removed.
   */
  private val connections = ConcurrentLinkedQueue<RealConnection>()

  init {
    // Put a floor on the keep alive duration, otherwise cleanup will spin loop.

     *
     * <p>This method performs a paginated search through all data configurations,
     * applying any search filters specified in the pager. The results are sorted
     * by sort order and name.</p>
     *
     * @param dataConfigPager the pager containing search criteria and pagination settings
     * @return a list of DataConfig entities matching the search criteria