export declare enum LogLevel {
    TRACE = 1,
    DEBUG = 2,
    INFO = 3,
    WARN = 4,
    ERROR = 5
}
export declare function toLogLevelString(logLevel: LogLevel): string;
type Params = {
    prefix?: string[];
    logLevel?: LogLevel;
    withElappsedTimePrefix?: boolean;
};
/**
 *
 * @param configs a config heirarchy (anscestors) of this logger
 */
export declare function Logger(params?: Params): {
    msg: (msg: string) => string;
    printf: (msg: string) => void;
    echo: (msg: string) => void;
    trace: (msg: string) => void;
    debug: (msg: string) => void;
    info: (msg: string) => void;
    warn: (msg: string) => void;
    error: (msg: string) => void;
    subLogger: (subPrefix: string) => any;
    getLogLevel: () => LogLevel;
    setLogLevel: (logLevel: LogLevel) => void;
};
export type Logger = ReturnType<typeof Logger>;
export {};