override fun isExecuted(): Boolean = error("unexpected")

  override fun isCanceled(): Boolean = error("unexpected")

  override fun timeout(): Timeout = error("unexpected")

  override fun addEventListener(eventListener: EventListener) = error("unexpected")

  override fun <T : Any> tag(type: KClass<T>): T? = error("unexpected")

  override fun <T> tag(type: Class<out T>): T? = error("unexpected")

   * that they are not interested in.
   *
   * @see EventListener for semantics and restrictions on listener implementations.
   */
  fun addEventListener(eventListener: EventListener)

  /**
   * Returns the tag attached with [type] as a key, or null if no tag is attached with that key.
   *

            """
        ),
    ] = None
    event: Annotated[
        str | None,
        Doc(
            """
            Optional event type name.

            Maps to `addEventListener(event, ...)` on the browser. When omitted,
            the browser dispatches on the generic `message` event.
            """
        ),
    ] = None
    id: Annotated[
        str | None,

  internal val plansToCancel = CopyOnWriteArrayList<RoutePlanner.Plan>()

  private val tags = AtomicReference(originalRequest.tags)

  override fun timeout(): Timeout = timeout

  override fun addEventListener(eventListener: EventListener) {
    // Atomically replace the current eventListener with a composite one.
    do {
      val previous = this.eventListener

  private fun Call.addEventRecorder(eventRecorder: EventRecorder) {
    when (listenerInstalledOn) {
      ListenerInstalledOn.Call -> {
        addEventListener(eventRecorder.eventListener)
      }

      ListenerInstalledOn.Relay -> {
        addEventListener(EventListenerRelay(this, eventRecorder).eventListener)
      }

      ListenerInstalledOn.Client -> {} // listener is added elsewhere.
    }
  }

                resolve();
            } else {
                img.addEventListener('load', () => {
                    if (img.naturalHeight !== 0) {
                        resolve();
                    } else {
                        reject();
                    }
                });
                img.addEventListener('error', reject);
            }
        });
    });

                }
            }
        });

        eventSource.addEventListener('sources', function(e) {
            var data = JSON.parse(e.data);
            if (data.sources && data.sources.length > 0 && messageElement) {
                addSourcesToMessage(messageElement, data.sources);
            }
        });

        eventSource.addEventListener('done', function(e) {
            var data = JSON.parse(e.data);

        override fun isExecuted(): Boolean = TODO()

        override fun isCanceled(): Boolean = TODO()

        override fun timeout(): Timeout = TODO()

        override fun addEventListener(eventListener: EventListener) = TODO()

        override fun <T : Any> tag(type: KClass<T>): T? = TODO()

        override fun <T> tag(type: Class<out T>): T? = TODO()

        override fun <T : Any> tag(

  var eventCount = 0

  private fun onEvent(callEvent: CallEvent) {
    if (eventCount++ == 0) {
      eventRecorder.logEvent(callEvent)
      val next = EventListenerRelay(call, eventRecorder)
      call.addEventListener(next.eventListener)
    }
  }

document.addEventListener("DOMContentLoaded", function () {
  var script = document.createElement("script");
  script.src = "https://widget.kapa.ai/kapa-widget.bundle.js";
  script.setAttribute("data-website-id", "91f47f27-b405-4299-bf5f-a1c0ec07b3cc");
  script.setAttribute("data-project-name", "FastAPI");
  script.setAttribute("data-project-color", "#009485");
  script.setAttribute("data-project-logo", "https://fastapi.tiangolo.com/img/favicon.png");