}
        };
    List<Object> list = Collections.singletonList(object);
    for (int i = 0; i < 10; i++) {
      Object[] array = new Object[500];
      Arrays.fill(array, list);
      list = Arrays.asList(array);
    }
    future2.set(list);

    unused = future.toString();
  }

  public void testToString_notDone() throws Exception {
    AbstractFuture<Object> testFuture =

        if (file.isDirectory()) {
          File[] files = file.listFiles();
          if (files != null) {
            return unmodifiableList(Arrays.asList(files));
          }
        }

        return ImmutableList.of();
      };

  /**
   * Returns a predicate that returns the result of {@link File#isDirectory} on input files.
   *

   * elements.
   *
   * <p>To cycle over the elements {@code n} times, use the following: {@code
   * Iterables.concat(Collections.nCopies(n, Arrays.asList(elements)))}
   *
   * <p><b>Java 8+ users:</b> If passing a single element {@code e}, the {@code Stream} equivalent
   * of this method is {@code Stream.generate(() -> e)}. Otherwise, put the elements in a collection

        if (file.isDirectory()) {
          File[] files = file.listFiles();
          if (files != null) {
            return unmodifiableList(Arrays.asList(files));
          }
        }

        return ImmutableList.of();
      };

  /**
   * Returns a predicate that returns the result of {@link File#isDirectory} on input files.
   *

          }
        };
    List<Object> list = Collections.singletonList(object);
    for (int i = 0; i < 10; i++) {
      Object[] array = new Object[500];
      Arrays.fill(array, list);
      list = Arrays.asList(array);
    }
    future2.set(list);

    unused = future.toString();
  }

  public void testToString_notDone() throws Exception {
    AbstractFuture<Object> testFuture =

   * elements.
   *
   * <p>To cycle over the elements {@code n} times, use the following: {@code
   * Iterables.concat(Collections.nCopies(n, Arrays.asList(elements)))}
   *
   * <p><b>Java 8+ users:</b> If passing a single element {@code e}, the {@code Stream} equivalent
   * of this method is {@code Stream.generate(() -> e)}. Otherwise, put the elements in a collection

                })
                        .filter(o -> o != null && keySet.add(o.getFirst()))
                        .collect(HashMap<String, List<String>>::new, (m, d) -> m.put(d.getFirst(), Arrays.asList(d.getSecond().split(","))),
                                HashMap::putAll));
            }
            propMap.put(DEFAULT_LABEL_VALUES, map);
        }
        return map.entrySet().stream().flatMap(e -> {

        for (final Map.Entry<String, String[]> e : request.getParameterMap().entrySet()) {
            if (e.getValue().length > 0) {
                params.put(e.getKey(), Arrays.asList(e.getValue()));
            }
        }
        if (logger.isDebugEnabled()) {
            logger.debug("process authentication: url: {}, params: {}", urlBuf, params);
        }

 * @since 1.0
 */
@GwtCompatible
public final class Futures extends GwtFuturesCatchingSpecialization {

  // A note on memory visibility.
  // Many of the utilities in this class (transform, withFallback, withTimeout, asList, combine)
  // have two requirements that significantly complicate their design.
  // 1. Cancellation should propagate from the returned future to the input future(s).

    configure OkHttp 3.13 to allow TLSv1 and TLSv1.1 connections:

    ```
    OkHttpClient client = new OkHttpClient.Builder()
        .connectionSpecs(Arrays.asList(ConnectionSpec.COMPATIBLE_TLS))
        .build();
    ```

 *  New: You can now access HTTP trailers with `Response.trailers()`. This method may only be called
    after the entire HTTP response body has been read.