export function applyCallBack(eventName: any, ...args: any[]): Promise<PromiseSettledResult<any>[]>;
/**
 * @param {string} eventName
 * @param {Promise} callBack
 * @return {void}
 */
export function addCallBack(eventName: string, callBack: Promise<any>): void;
export function removeCallBack(eventName: any, callBack: any): void;
export namespace Event {
    let BEFORE_WATSON_CALL: string;
    let AFTER_WATSON_CALL: string;
    let REPLACE_CONV_VAR: string;
}