/**
 * @hidden
 * Hide from docs
 * ------
 * Provides APIs to interact with the full-trust part of the SDK. Limited to 1P applications
 * @internal
 * Limited to Microsoft-internal use
 * @module
 */
/**
 * @hidden
 * Hide from docs
 * ------
 * Place the tab into full-screen mode.
 *
 */
export declare function enterFullscreen(): void;
/**
 * @hidden
 * Hide from docs
 * ------
 * Reverts the tab into normal-screen mode.
 */
export declare function exitFullscreen(): void;
/**
 * @hidden
 *
 * Checks if the pages.fullTrust capability is supported by the host
 * @returns boolean to represent whether the pages.fullTrust capability is supported
 *
 * @throws Error if {@linkcode app.initialize} has not successfully completed
 */
export declare function isSupported(): boolean;