}

    assertThat(future.isDone()).isFalse();
    assertThat(future.set(1)).isTrue();
    assertSuccessful(future, 1);
  }

  /** Concrete subclass for testing. */
  private static class TestedFuture<V> extends AbstractFuture<V> {
    private static <V> TestedFuture<V> create() {
      return new TestedFuture<V>();
    }
  }

  private static final class CountingRunnable implements Runnable {
    int count;

import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * A package-local class holding common representation and mechanics for classes supporting dynamic
 * striping on 64bit values. The class extends Number so that concrete subclasses must publicly do
 * so.
 */
@GwtIncompatible
@ElementTypesAreNonnullByDefault
abstract class Striped64 extends Number {
  /*
   * This class maintains a lazily-initialized table of atomically

 * They don't specify whether a specific proxy server should be used or how to authenticate with that proxy server.

They're also concrete: each URL identifies a specific path (like `/square/okhttp`) and query (like `?q=sharks&lang=en`). Each webserver hosts many URLs.

### [Addresses](https://square.github.io/okhttp/4.x/okhttp/okhttp3/-address/)

			}
		}
		quorum := len(perPoolErrs) / 2
		poolErrs = append(poolErrs, reduceWriteQuorumErrs(ctx, perPoolErrs, bucketOpIgnoredErrs, quorum))
	}

	opts.Remove = isAllBucketsNotFound(poolErrs)
	opts.Recreate = !opts.Remove

	g = errgroup.WithNErrs(len(sys.peerClients))
	healBucketResults := make([]madmin.HealResultItem, len(sys.peerClients))
	for idx, client := range sys.peerClients {
		idx := idx
		client := client

   */
  public static <K extends @Nullable Object, V extends @Nullable Object>
      LinkedHashMultimap<K, V> create(Multimap<? extends K, ? extends V> multimap) {
    LinkedHashMultimap<K, V> result = create(multimap.keySet().size(), DEFAULT_VALUE_SET_CAPACITY);
    result.putAll(multimap);
    return result;
  }

By considering these concepts, you will be able to **evaluate and design** the best way to deploy **your own APIs**.

In the next chapters, I'll give you more **concrete recipes** to deploy FastAPI applications.

But for now, let's check these important **conceptual ideas**. These concepts also apply to any other type of web API. 💡

## Security - HTTPS

	}
	if string(s) == goVersion {
		return nil
	}

	goroot, err := findGoroot()
	if err != nil {
		return err
	}

	// Delete the device's GOROOT, GOPATH and any leftover test data,
	// and recreate GOROOT.
	if err := adb("exec-out", "rm", "-rf", deviceRoot); err != nil {
		return err
	}

	// Build Go for Android.
	cmd = exec.Command(goTool, "install", "cmd")
	out, err = cmd.CombinedOutput()

    create().isEmpty();
    create().iterator();
    create().remove("foo");
    create().removeAll(ImmutableList.of("foo"));
    create().retainAll(ImmutableList.of("foo"));
    create().size();
    create().toArray();
    create().toArray(new String[] {"foo"});
    create().addFirst("e");
    create().addLast("e");
    create().offerFirst("e");
    create().offerLast("e");
    create().removeFirst();

            ContiguousSet.create(Range.closed(1, 3), integers()),
            ContiguousSet.closed(1, 3),
            ContiguousSet.create(Range.closedOpen(1, 4), integers()),
            ContiguousSet.closedOpen(1, 4),
            ContiguousSet.create(Range.openClosed(0, 3), integers()),
            ContiguousSet.create(Range.open(0, 4), integers()),
            ContiguousSet.create(Range.closed(1, 3), NOT_EQUAL_TO_INTEGERS),

            ContiguousSet.create(Range.closed(1, 3), integers()),
            ContiguousSet.closed(1, 3),
            ContiguousSet.create(Range.closedOpen(1, 4), integers()),
            ContiguousSet.closedOpen(1, 4),
            ContiguousSet.create(Range.openClosed(0, 3), integers()),
            ContiguousSet.create(Range.open(0, 4), integers()),
            ContiguousSet.create(Range.closed(1, 3), NOT_EQUAL_TO_INTEGERS),