import { AuthoringAsset, AuthoringContentItem, BaseAuthoringItem, User } from "@acoustic-content-sdk/api";
import { AccessorType } from "@acoustic-content-sdk/edit-api";
import { Updater } from "../update";
/**
 * Updates properties of the item that depend on the environment
 *
 * @param aItem - updater for the item
 * @param aUser - optionally the current user
 * @returns the updater after the item has been modified
 */
export declare function updateGenericProperties<T extends BaseAuthoringItem>(aItem: Updater<T>, aUser?: User): Updater<T>;
export declare function updateImageElement(aAccessor: AccessorType, aItem: Updater<AuthoringContentItem>, aAsset: AuthoringAsset): Updater<AuthoringContentItem>;
/**
 * Retrieves a property value by accessor
 */
export declare const getValueByAccessor: <T>(aItem: BaseAuthoringItem, aAccessor: string) => T;
/**
 * Updates a single property based on the accessor expression.
 *
 * @param aAccessor - the accessor expression that points
 * @param aValue - the new value
 * @param aItem - the item to update
 *
 * @returns a copy of the item with the modified value
 */
export declare function updateValueByAccessor<T extends BaseAuthoringItem>(aAccessor: AccessorType, aValue: any, aItem: T, aUser?: User): Updater<T>;
export declare function removeArrayItemByAccessor<T extends BaseAuthoringItem>(aAccessor: AccessorType, aItem: T, aUser?: User): Updater<T>;