import { AuthoringContentItem, Logger, MultiImageElement, SingleImageElement } from '@acoustic-content-sdk/api';
export declare function isAuthoringContentItem(aValue: any): aValue is AuthoringContentItem;
export declare function isSingleImageElementInAuthoring(value: any): value is SingleImageElement;
export declare function isMultiImageElementInAuthoring(value: any): value is MultiImageElement;
/**
 * Find all outbound content references
 *
 * @param aContentItem - the content item
 * @returns the references
 */
export declare function referencedContent(aContentItem: AuthoringContentItem, aLogger: Logger): string[];
/**
 * Find all outbound asset references
 *
 * @param aContentItem - the content item
 * @returns the asset references
 */
export declare function referencedAssets(aContentItem: AuthoringContentItem, aLogger: Logger): string[];