import { RegisteredHooks, Hook, HookName } from '../types/types';
/**
 * @description Register a callback function (a "hook") that will be called for a given hook name.
 *      Hook names are called at specific points during execution and allow some form of extensibility.
 * @param hookName A specific string, one of the HookName type.
 * @param callback The function to call when the system performs certain actions, described by the hook's name.
 */
export declare const addHook: (hook: Hook) => RegisteredHooks;
/**
 * @description Remove a hook
 * @param hookName A specific string, one of the HookName type.
 * @private
 */
export declare const removeHook: (hook: HookName) => RegisteredHooks;
/**
 * @description Retrieve a hook object that has been stored.
 * @param hookName
 */
export declare const getHook: (hookName: HookName) => Function;
/**
 * Used for unit testing
 * @private
 */
export declare const resetHooks: () => void;
/**
 * Used for unit testing
 * @private
 */
export declare const getHooks: () => RegisteredHooks;
/**
 * @description Look for an array of Hook objects that a developer may have provided in the window.sheerId object.
 *     If present, add each to the internal registry of hooks.
 *
 * @private
 * @returns true if any hooks were successfully registered.
 */
export declare const addPredefinedHooks: () => boolean;