export declare class Trace extends Object {
    static FILE: any;
    static LISTENER: any;
    static METHODS: number;
    static METHODS_AND_LINES: number;
    static METHODS_AND_LINES_WITH_ARGS: number;
    static METHODS_WITH_ARGS: number;
    static OFF: number;
    static getLevel(target?: number): number;
    static getListener(): Function;
    static setLevel(l: number, target?: number): any;
    static setListener(f: Function): any;
}