LocalCache<?, ?> map = CacheTesting.toLocalCache(cache);

    assertThat(map.segments).hasLength(4);
    // 1 is as low as it goes, not 0. it feels dirty to know this/test this.
    assertThat(map.segments[0].table.length()).isEqualTo(1);
    assertThat(map.segments[1].table.length()).isEqualTo(1);
    assertThat(map.segments[2].table.length()).isEqualTo(1);

    LocalCache<?, ?> map = CacheTesting.toLocalCache(cache);

    assertThat(map.segments).hasLength(4);
    // 1 is as low as it goes, not 0. it feels dirty to know this/test this.
    assertThat(map.segments[0].table.length()).isEqualTo(1);
    assertThat(map.segments[1].table.length()).isEqualTo(1);
    assertThat(map.segments[2].table.length()).isEqualTo(1);

                modelRequest.setTwoPhaseBuilding(false);
                // This merge is on purpose because otherwise user properties would override model
                // properties in dependencies the user does not know. See MNG-7563 for details.
                modelRequest.setSystemProperties(
                        toProperties(session.getUserProperties(), session.getSystemProperties()));

These examples are intentionally simple, but show how it all works.

In the chapters about security, there are utility functions that are implemented in this same way.

If you understood all this, you already know how those utility tools for security work underneath.

///

## Dependencies with `yield`, `HTTPException`, `except` and Background Tasks { #dependencies-with-yield-httpexception-except-and-background-tasks }

/// warning

   | specific paths and repository locations which allow the build to work in the local environment.
   |
   | For example, if you have an integration testing plugin - like cactus - that needs to know where
   | your Tomcat instance is installed, you can provide a variable here such that the variable is
   | dereferenced during the build process to configure the cactus plugin.
   |

    // that have the same key. Then a second pass will remove all but the first of the slots that
    // have this Entry. The value in the map becomes false when this first entry has been copied, so
    // we know not to copy the remaining ones.
    IdentityHashMap<Entry<K, V>, Boolean> duplicates = null;
    int dupCount = 0;
    for (int entryIndex = n - 1; entryIndex >= 0; entryIndex--) {

  /**
   * Returns the comparator that orders the columns. With natural ordering, {@link
   * Ordering#natural()} is returned.
   *
   * @deprecated Store the {@link Comparator} alongside the {@link Table}. Or, if you know that the
   *     {@link Table} contains at least one value, you can retrieve the {@link Comparator} with:
   *     {@code ((SortedMap<C, V>) table.rowMap().values().iterator().next()).comparator();}.
   */
  @Deprecated

I used to say I didn't like history that much... and look at me now giving "tech history" lessons. 😅

     * in any IO with the server. Unlink <code>InputStream</code> value less than
     * the one provided will not be returned if it exceeds the end of the file
     * (if this is a problem let us know).
     */
    @Override
    public long skip(final long n) throws IOException {
        if (n > 0) {
            fp += n;
            return n;
        }
        return 0;
    }

By returning the result of calling `generate_html_response()`, you are already returning a `Response` that will override the default **FastAPI** behavior.

But as you passed the `HTMLResponse` in the `response_class` too, **FastAPI** will know how to document it in OpenAPI and the interactive docs as HTML with `text/html`:

<img src="/img/tutorial/custom-response/image01.png">

## Available responses { #available-responses }