/**
 * Creates scope that will be preserved for the lifetime of the supplied asynchronous invocations.
 *
 * @param contextItems An array of objects that will be scoped.
 * @param asyncFunction The root asynchronous function for which scope is to be preserved.
 */
export declare function using(contextItems: Object[], asyncFunction: Function): void;
/**
 * Retrieves an object from the current scope.
 *
 * @param objectType A constructor function representing the type of object that should be returned.
 * @returns An object from the current scope that is of the supplied type; or 'undefined' if no
 * object of that type could be found in the current scope.
 */
export declare function getCurrentObject(objectType: Function): Object;
/**
 * Bind an EventEmitter to the currently active context stack.
 *
 * @param emitter The EventEmitter to bind.
 */
export declare function bindEventEmitter(emitter: NodeJS.EventEmitter): void;