synchronized (mutex) {
        return delegate().computeIfAbsent(key, mappingFunction);
      }
    }

    @SuppressWarnings("nullness") // TODO: b/423853632 - Remove after checker is fixed.
    @Override
    public @Nullable V computeIfPresent(
        K key, BiFunction<? super K, ? super @NonNull V, ? extends @Nullable V> remappingFunction) {

   *
   * <p>See {@link #checkArgument(boolean, String, Object...)} for details.
   *
   * @since 20.0 (varargs overload since 2.0)
   */
  public static void checkArgument(
      boolean expression,
      // TODO: cl/604933487 - Make errorMessageTemplate consistently @Nullable across overloads.
      @Nullable String errorMessageTemplate,
      @Nullable Object p1,
      @Nullable Object p2) {
    if (!expression) {

                skippedFilesWithTestAndReason.put(file, testWithReason);
            }
        });

        RestTestTransformer transformer = new RestTestTransformer();
        // TODO: instead of flattening the FileTree here leverage FileTree.visit() so we can preserve folder hierarchy in a more robust way
        for (File file : getTestFiles().getFiles()) {

      @Override
      protected Iterator<Integer> newTargetIterator() {
        return Iterators.forArray(1, 2, 3);
      }
    }.test();
  }

  /*
   * TODO(cpovirk): Test forArray with ListIteratorTester (not just IteratorTester), including with
   * a start position other than 0.
   */

  public void testForEnumerationEmpty() {

     * that can lead to NullPointerException. That's unfortunate. But hopefully most Kotlin callers
     * use `get(key) ?: defaultValue` instead of this method, anyway.
     */
    V result = get(key);
    // TODO(b/192579700): Use a ternary once it no longer confuses our nullness checker.
    if (result != null) {
      return result;
    } else {
      return defaultValue;
    }
  }

      checkArgument(
          newLower.compareTo(newUpper) <= 0,
          "intersection is undefined for disconnected ranges %s and %s",
          this,
          connectedRange);

      // TODO(kevinb): all the precondition checks in the constructor are redundant...
      return create(newLower, newUpper);
    }
  }

  /**

    assertEquals(6, queue.size());
    assertEquals(8, queue.capacity());
    assertEquals(42, queue.maximumSize);
    assertThat(queue.comparator()).isEqualTo(SOME_COMPARATOR);
  }

  // TODO: tests that check the weird interplay between expected size,
  // maximum size, size of initial contents, default capacity...

  private static void checkNatural(MinMaxPriorityQueue<Integer> queue) {

            if (s != null) {
                write(s);
            }
            write(LINE_SEPARATOR);
        }
    } // class PropertiesWriter

    /**
     * TODO
     */
    protected static class Layout {

        private List<String> commentLines;
        private List<String> valueLines;

        public Layout() {}

            if (s != null) {
                write(s);
            }
            write(LINE_SEPARATOR);
        }
    } // class PropertiesWriter

    /**
     * TODO
     */
    protected static class Layout {

        private List<String> commentLines;
        private List<String> valueLines;

        public Layout() {}

            )

        # Handle on_startup/on_shutdown locally since Starlette removed support
        # Ref: https://github.com/Kludex/starlette/pull/3117
        # TODO: deprecate this once the lifespan (or alternative) interface is improved
        self.on_startup: list[Callable[[], Any]] = (
            [] if on_startup is None else list(on_startup)
        )