try {
      b0 = source.readByte() and 0xff
    } finally {
      source.timeout().timeout(timeoutBefore, TimeUnit.NANOSECONDS)
    }

    opcode = b0 and B0_MASK_OPCODE
    isFinalFrame = b0 and B0_FLAG_FIN != 0
    isControlFrame = b0 and OPCODE_FLAG_CONTROL != 0

    // Control frames must be final frames (cannot contain continuations).
    if (isControlFrame && !isFinalFrame) {

     * Resource holder that tracks resource lifecycle
     */
    private static class ResourceHolder {
        final String resourceId;
        final String resourceType;
        final WeakReference<AutoCloseable> resourceRef;
        final PhantomReference<AutoCloseable> phantomRef;
        final long creationTime;
        final StackTraceElement[] allocationStackTrace;
        volatile boolean closed;

    assertThat(getDone(stackDepthCheck))
        .isLessThan(Thread.currentThread().getStackTrace().length + 100);
  }

  private static final class LongHolder {
    long count;
  }

  private static final int ITERATION_COUNT = 50_000;
  private static final int DIRECT_EXECUTIONS_PER_THREAD = 100;

  @J2ktIncompatible
  @GwtIncompatible // threads

    Thread thread =
        new Thread() {
          @Override
          public void run() {
            try {
              cacheRef.get().getUnchecked(3);
            } finally {
              doneSignal.countDown();
            }
          }
        };
    thread.setUncaughtExceptionHandler(
        new UncaughtExceptionHandler() {
          @Override

            assertNull(limitedManager.getLease(key1));

            // key2 should still exist (not the oldest)
            assertNotNull(limitedManager.getLease(key2));
        } finally {
            limitedManager.shutdown();
        }
    }

    @Test
    @DisplayName("Should register and manage file cache")
    void testFileCache() {
        String path = "/share/cached.txt";

🚥 👆 ⚙️ `try` 🍫 🔗 ⏮️ `yield`, 👆 🔜 📨 🙆 ⚠ 👈 🚮 🕐❔ ⚙️ 🔗.

🖼, 🚥 📟 ☝ 🖕, ➕1️⃣ 🔗 ⚖️ *➡ 🛠️*, ⚒ 💽 💵 "💾" ⚖️ ✍ 🙆 🎏 ❌, 👆 🔜 📨 ⚠ 👆 🔗.

, 👆 💪 👀 👈 🎯 ⚠ 🔘 🔗 ⏮️ `except SomeException`.

🎏 🌌, 👆 💪 ⚙️ `finally` ⚒ 💭 🚪 📶 🛠️, 🙅‍♂ 🤔 🚥 📤 ⚠ ⚖️ 🚫.

{* ../../docs_src/dependencies/tutorial007.py hl[3,5] *}

## 🎧-🔗 ⏮️ `yield`

👆 💪 ✔️ 🎧-🔗 & "🌲" 🎧-🔗 🙆 📐 & 💠, & 🙆 ⚖️ 🌐 👫 💪 ⚙️ `yield`.

              nextEvent.subscribers.next().dispatchEvent(nextEvent.event);
            }
          }
        } finally {
          dispatching.remove();
          queue.remove();
        }
      }
    }

    private static final class Event {
      private final Object event;
      private final Iterator<Subscriber> subscribers;

      private Event(Object event, Iterator<Subscriber> subscribers) {

            assertTrue(queryFieldConfig.notAnalyzedFieldSet.contains("field4"));
            assertTrue(queryFieldConfig.notAnalyzedFieldSet.contains("field5"));
        } finally {
            // Restore original config
            ComponentUtil.setFessConfig(originalConfig);
            // Restore original queryFieldConfig
            queryFieldConfig = new QueryFieldConfig();

          @ParametricNullness V5 value5)
          throws Exception;
    }

    private final ClosingFuture<V1> future1;
    private final ClosingFuture<V2> future2;
    private final ClosingFuture<V3> future3;
    private final ClosingFuture<V4> future4;
    private final ClosingFuture<V5> future5;

    private Combiner5(
        ClosingFuture<V1> future1,
        ClosingFuture<V2> future2,

        try {
            final InputStream is = request.getInputStream();
            try {
                final byte[] buf = new byte[1024];
                while ((is.read(buf)) != -1) {}
            } catch (final Exception ignored) {} finally {
                try {
                    is.close();
                } catch (final Exception ignored) {}
            }