implementation. This is useful in sandboxed environments like Google App
    Engine.

 *  **OkHttp now does cookies.** We've replaced `java.net.CookieHandler` with
    a new interface, `CookieJar` and added our own `Cookie` model class. This
    new cookie follows the latest RFC and supports the same cookie attributes
    as modern web browsers.

 *  **Form and Multipart bodies are now modeled.** We've replaced the opaque

* API keys en:
    * Headers.
    * Parámetros de query.
    * Cookies, etc.

Además de todas las características de seguridad de Starlette (incluyendo **cookies de sesión**).

Todo construido como herramientas y componentes reutilizables que son fáciles de integrar con tus sistemas, almacenes de datos, bases de datos relacionales y NoSQL, etc.

   */
  public static final String SERVICE_WORKER_ALLOWED = "Service-Worker-Allowed";

  /** The HTTP {@code Set-Cookie} header field name. */
  public static final String SET_COOKIE = "Set-Cookie";

  /** The HTTP {@code Set-Cookie2} header field name. */
  public static final String SET_COOKIE2 = "Set-Cookie2";

  /**
   * The HTTP <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/SourceMap">{@code

* API Schlüssel in:
    * Header-Feldern.
    * Anfrageparametern.
    * Cookies, usw.

Zusätzlich alle Sicherheitsfunktionen von Starlette (inklusive **Session Cookies**).

* API keys in:
    * Headers.
    * Query parameters.
    * Cookies, etc.

Plus all the security features from Starlette (including **session cookies**).

All built as reusable tools and components that are easy to integrate with your systems, data stores, relational and NoSQL databases, etc.

  }

  @Override
  public boolean contains(@Nullable Object rowKey, @Nullable Object columnKey) {
    Map<C, V> row = safeGet(rowMap(), rowKey);
    return row != null && Maps.safeContainsKey(row, columnKey);
  }

  @Override
  public @Nullable V get(@Nullable Object rowKey, @Nullable Object columnKey) {
    Map<C, V> row = safeGet(rowMap(), rowKey);
    return (row == null) ? null : safeGet(row, columnKey);
  }

    public SortedMap<C, V> subMap(C fromKey, C toKey) {
      checkArgument(rangeContains(checkNotNull(fromKey)) && rangeContains(checkNotNull(toKey)));
      return new TreeRow(rowKey, fromKey, toKey);
    }

    @Override
    public SortedMap<C, V> headMap(C toKey) {
      checkArgument(rangeContains(checkNotNull(toKey)));
      return new TreeRow(rowKey, lowerBound, toKey);
    }

    @Override

* <abbr title="також відомий як: serialization, parsing, marshalling">Перетворення</abbr> вхідних даних: з мережі до даних і типів Python. Читання з:
    * JSON.
    * Параметрів шляху.
    * Параметрів запиту.
    * Cookies.
    * Headers.
    * Forms.
    * Файлів.
* <abbr title="також відомий як: serialization, parsing, marshalling">Перетворення</abbr> вихідних даних: з типів і даних Python до мережевих даних (як JSON):

* Chaves de API em:
    * Headers.
    * parâmetros da Query.
    * Cookies etc.

Além disso, todos os recursos de seguranças do Starlette (incluindo **cookies de sessão**).

You can define Header parameters the same way you define `Query`, `Path` and `Cookie` parameters.

## Import `Header` { #import-header }

First import `Header`:

{* ../../docs_src/header_params/tutorial001_an_py310.py hl[3] *}

## Declare `Header` parameters { #declare-header-parameters }

Then declare the header parameters using the same structure as with `Path`, `Query` and `Cookie`.