File file, Charset charset, LineProcessor<T> callback) throws IOException {
    return asCharSource(file, charset).readLines(callback);
  }

  /**
   * Process the bytes of a file.
   *
   * <p>(If this seems too complicated, maybe you're looking for {@link #toByteArray}.)
   *
   * @param file the file to read
   * @param processor the object to which the bytes of the file are passed.
   * @return the result of the byte processor

    /**
     * @return {@code true} if the current thread has acquired this lock.
     */
    boolean isAcquiredByCurrentThread();
  }

  /**
   * A {@code LockGraphNode} associated with each lock instance keeps track of the directed edges in
   * the lock acquisition graph.
   */
  private static final class LockGraphNode {

    /**

- Allows PreStop lifecycle handler's sleep action to have a zero value ([#127094](https://github.com/kubernetes/kubernetes/pull/127094), [@sreeram-venkitesh](https://github.com/sreeram-venkitesh)) [SIG Apps, Node and Testing]

    assertThat(connection.isHealthy(System.nanoTime())).isTrue()

    // But if the ping doesn't arrive, the connection goes unhealthy.
    Thread.sleep(TimeUnit.NANOSECONDS.toMillis(Http2Connection.DEGRADED_PONG_TIMEOUT_NS.toLong()))
    assertThat(connection.isHealthy(System.nanoTime())).isFalse()

    // When a pong does arrive, the connection becomes healthy again.

- Implemented full support for contextual logging in  `client-go/rest`. `BackoffManagerWithContext` was used instead of  `BackoffManager` to ensure that the caller could interrupt the sleep. ([#127709](https://github.com/kubernetes/kubernetes/pull/127709), [@pohly](https://github.com/pohly)) [SIG API Machinery, Architecture, Auth, Cloud Provider, Instrumentation, Network and Node]

     * is the only one in use, but if we encounter nested concatenations, we start a deque of
     * meta-iterators rather than letting the nesting get arbitrarily deep.  This keeps each
     * operation O(1).
     */

    private @Nullable Iterator<? extends Iterator<? extends T>> topMetaIterator;

    // Only becomes nonnull if we encounter nested concatenations.

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   */
  @GwtIncompatible // Duration
  @SuppressWarnings("GoodTime") // duration decomposition
  private static long toNanosSaturated(Duration duration) {
    // Using a try/catch seems lazy, but the catch block will rarely get invoked (except for
    // durations longer than approximately +/- 292 years).
    try {
      return duration.toNanos();
    } catch (ArithmeticException tooBig) {

- [migration phase 1] PodMatchNodeSelector/NodAffinity as filter plugin ([#83660](https://github.com/kubernetes/kubernetes/pull/83660), [@wgliang](https://github.com/wgliang))
- Add more tracing steps in generic_scheduler ([#83539](https://github.com/kubernetes/kubernetes/pull/83539), [@wgliang](https://github.com/wgliang))

performing the TLS Bootstrap properly. Earlier, `kubeadm join` only did the discovery part and exited successfully without checking that the kubelet actually started properly and performed the TLS bootstrap correctly. Now, as kubeadm runs some post-join steps (for example, annotating the Node API object with the CRISocket), `kubeadm join` is now waiting for the kubelet to perform the TLS Bootstrap, and then uses that credential to perform further actions. This also improves the UX, as `kubeadm` will exit...