* @param {string} id The ID of the page to be retrieved. * @return {!./amp-story-page.AmpStoryPage} Retrieves the page with the * specified

* @param {function()} startTimer

* Returns true if `value` is a valid result for a (tag, property) binding. * Otherwise, returns false. * @param {string} tag * @param {string

* Runs the specified measure, then runs the mutation on the element and * ensures that remeasures and layouts are performed for the affected * e

* Unmounts the element and makes it ready for the next mounting * operation. * @final

* Throws an error if the first argument isn't a number. The allowed values * include `0` and `NaN`. * * For more details see `assert`. *

@override

@override

* Animate and snap to the correct slide for a given scrollLeft. * @param {number} currentScrollLeft scrollLeft value of the slides container. *

* Creates if not yet created and returns the shared Gestures instance for * the specified element. * @param {!Element} element * @param {bool

* Returns the time when the document has become visible for the last time. * If document has not yet become visible, the returned value is `null`.

* Gets the root element. * @visibleForTesting * @return {?Element}

* @return {boolean}

* Sets the viewer defined visibility state. * @param {?string|undefined} state * @private

@override

* Get the LINKER_PARAM(name, id) value from url and clean the value * @param {string} name * @param {string} id * @return {?string}

* Returns number of handlers. Mostly needed for tests. * @return {number}

* Returns the tracker for the specified name and type. If the tracker * has not been requested before, it will be created. * * @param {string

* Returns promise that resolves when page and platform configs are processed. * @return {!Promise} * @private

@override

* Register an action for AMP documents to execute an API handler. * * This has no effect on Bento documents, since they lack an Actions system.

@override

@override

@override

* Returns a previously measured layout box adjusted to the viewport. This * mainly affects fixed-position elements that are adjusted to be always

* Returns true if this is a CI build. * @return {boolean}

* Whether the runtime in the single-doc mode. Alternative is the shadow-doc * mode that supports multiple documents per a single window. * @retu

* Whether the AMP document currently visible. The reasons why it might not * be visible include user switching to another tab, browser running the

* Display the UI. * @param {boolean} isActionPromptTrigger

* @param {!Uint8Array} data * @return {!Promise<!Uint8Array>}

@override

* @param {number} time * @param {...*} args

* Returns promise that resolves when the element has been built. * @return {!Promise}

* Whether the node is currently contained in the DOM of the root. * @param {?Node} node * @return {boolean}

@override @abstract

* @param {!HTMLMediaElement} mediaEl The element on which this task should be * executed. * @return {!Promise} A promise that is resolved wh

* Runs the mutate operation via vsync. * @param {function():undefined} mutator

* Called to parse and validate the value of a mutation * @return {boolean}

@param {!../video-interface.VideoInterface} video

* Clears the singleton variables.

* @param {string} exprString * @return {string} value

* @param {string} hash * @param {Promise<T>} transformPromise

@param {string} href

* Shorthand to extract an environment variable. * @param {string} key * @return {string}

* @return {number}

@override

* Sends a message to all subscribed windows. * @param {string} type Type of the message. * @param {!JsonObject} data Message payload.

@override

* Implementation for `attachShadowDoc` function. Attaches the shadow doc and * configures ampdoc for it. * @param {!Element} hostElement * @p

* Ask the viewer to flush the ticks

* @param {number} steps

* @return {!Promise<JsonObject>}

* @param {!Event} unusedEvent

* The Gestures instance calls this method for each "touchstart" event. If * the recognizer wants to receive other touch events in the series, it ha

* @param {!{[key: string]: !LocalizedStringBundleDef}} localizedStringBundles * The localized string bundle to register. * @public