private final Callable<T> delegate;

    WrappedCallable(Callable<T> delegate) {
      this.delegate = delegate;
    }

    @Override
    public T call() throws Exception {
      return delegate.call();
    }
  }

  private static final class WrappedRunnable implements Runnable {
    private final Runnable delegate;

    WrappedRunnable(Runnable delegate) {

    if (call.connection != null) {
      check(toClose == null)
      return ReusePlan(candidate)
    }

    // The call's connection was released.
    toClose?.closeQuietly()
    call.eventListener.connectionReleased(call, candidate)
    candidate.connectionListener.connectionReleased(candidate, call)
    if (toClose != null) {
      candidate.connectionListener.connectionClosed(candidate)

     * Provides a hint for how many values will be associated with each key newly added to the
     * builder after this call. This does not change semantics, but may improve performance if
     * {@code expectedValuesPerKey} is a good estimate.
     *
     * <p>This may be called more than once; each newly added key will use the most recent call to
     * {@link #expectedValuesPerKey} as its hint.
     *

        JsonMappingOption option3 = provider.provideMappingOption();

        // All should be different instances
        assertNotSame(option1, option2);
        assertNotSame(option2, option3);
        assertNotSame(option1, option3);

        // But all should have the same configuration
        assertEquals(option1.getFieldNaming().get(), option2.getFieldNaming().get());

 * Prefer to alternate IP addresses from different address families, (IPv6 / IPv4), starting with IPv6.
 * Don't start a new attempt until 250 ms after the most recent attempt was started.
 * Keep whichever TCP connection succeeds first and cancel all the others.
 * Race TCP only. Only attempt a TLS handshake on the winning TCP connection.

        .build()
    val call = client.newCall(request)

    // Check the Kotlin-focused APIs.
    assertThat(call.tag(String::class)).isEqualTo("hello")
    assertThat(call.tag(Integer::class)).isEqualTo(5)
    assertThat(call.tag(Boolean::class)).isNull()
    assertThat(call.tag(Any::class)).isNull()

    // Check the Java APIs too.
    assertThat(call.tag(String::class.java)).isEqualTo("hello")

import org.jspecify.annotations.NullUnmarked;

/**
 * @author David Beaumont
 */
@GwtCompatible
@NullUnmarked
public class ArrayBasedEscaperMapTest extends TestCase {
  @SuppressWarnings("nullness") // test of a bogus call
  public void testNullMap() {
    assertThrows(NullPointerException.class, () -> ArrayBasedEscaperMap.create(null));
  }

  public void testEmptyMap() {
    Map<Character, String> map = ImmutableMap.of();

 * [GoogleAppEngineOkHttp](https://github.com/apkelly/GoogleAppEngineOkHttp): An OkHttp Call that works on Google App Engine.
 * [Hunter](https://github.com/Leaking/Hunter): Configure all OkHttpClients centrally.
 * ⬜️ [Moshi](https://github.com/square/moshi): A modern JSON library for Android and Java.

   * write.
   *
   * 2. visibility of the writes to an afterDone() call triggered by cancel():
   *
   * Since these fields are non-final that means that TimeoutFuture is not being 'safely published',
   * thus a motivated caller may be able to expose the reference to another thread that would then
   * call cancel() and be unable to cancel the delegate.

2. **Null Safety**: Constructors validate null arguments. Follow this pattern.

3. **Thread Safety**: `RequestProcessor` is single-use per request.

4. **Encoding**: Call `encoding()` before `param()` methods.