}
    }.test();
  }

  @GwtIncompatible // fairly slow (~40s)
  public void testConcatSingletonAndSingletonYieldsDoubleton() {
    new DoubletonIteratorTester() {
      @Override
      protected Iterator<Integer> newTargetIterator() {
        return Iterators.concat(iterateOver(1), iterateOver(2));
      }
    }.test();
  }

  @GwtIncompatible // fairly slow (~40s)

      }
    }.test();
  }

  @GwtIncompatible // fairly slow (~40s)
  public void testConcatSingletonAndSingletonYieldsDoubleton() {
    new DoubletonIteratorTester() {
      @Override
      protected Iterator<Integer> newTargetIterator() {
        return Iterators.concat(iterateOver(1), iterateOver(2));
      }
    }.test();
  }

  @GwtIncompatible // fairly slow (~40s)

    return countMap.size();
  }

  @Override
  public boolean isEmpty() {
    return countMap.isEmpty();
  }

  @Override
  Iterator<Entry<E>> entryIterator() {
    // AbstractIterator makes this fairly clean, but it doesn't support remove(). To support
    // remove(), we create an AbstractIterator, and then use ForwardingIterator to delegate to it.
    Iterator<Entry<E>> readOnlyIterator =

    return countMap.size();
  }

  @Override
  public boolean isEmpty() {
    return countMap.isEmpty();
  }

  @Override
  Iterator<Entry<E>> entryIterator() {
    // AbstractIterator makes this fairly clean, but it doesn't support remove(). To support
    // remove(), we create an AbstractIterator, and then use ForwardingIterator to delegate to it.
    Iterator<Entry<E>> readOnlyIterator =

     * returns 0, but if we had a SingletonImmutableSortedSet, this might no
     * longer be the case.)
     *
     * javax.naming.Name and java.util.concurrent.Delayed might work, but
     * they're fairly obscure, we've invented our own interface and class.
     */
    Interface a = new Impl();
    Interface b = new Impl();
    ImmutableSortedSet<Interface> set = ImmutableSortedSet.of(a, b);

## Recap { #recap }

Using container systems (e.g. with **Docker** and **Kubernetes**) it becomes fairly straightforward to handle all the **deployment concepts**:

* HTTPS
* Running on startup
* Restarts
* Replication (the number of processes running)
* Memory
* Previous steps before starting

And integrate standards-based user interface tools:

* [Swagger UI](https://github.com/swagger-api/swagger-ui)
* [ReDoc](https://github.com/Rebilly/ReDoc)

These two were chosen for being fairly popular and stable, but doing a quick search, you could find dozens of alternative user interfaces for OpenAPI (that you can use with **FastAPI**).

///

### Flask REST frameworks { #flask-rest-frameworks }

            }
        });

        chatClient.setTestSummaryMaxChars(20);
        final ChatSession session = new ChatSession();
        session.addUserMessage("Q1");
        session.addAssistantMessage("This is a fairly long response that should be summarized using smart summary mode.");

        final List<LlmMessage> history = chatClient.testExtractHistory(session);
        assertEquals(2, history.size());

     * returns 0, but if we had a SingletonImmutableSortedSet, this might no
     * longer be the case.)
     *
     * javax.naming.Name and java.util.concurrent.Delayed might work, but
     * they're fairly obscure, we've invented our own interface and class.
     */
    Interface a = new Impl();
    Interface b = new Impl();
    ImmutableSortedSet<Interface> set = ImmutableSortedSet.of(a, b);

        for (int i = 0; i < 10; i++) {
            final Map<String, Object> doc = new HashMap<>();
            doc.put("title", "Document " + i);
            doc.put("content", "This is a fairly long content for document " + i + " that should cause truncation.");
            documents.add(doc);
        }

        final String result = client.testBuildContext(documents);