import { LoggerLevel } from '../LoggerLevel';
import { LoggerArg } from '../LoggerInterface';
type FormatArgs = [string] | [string, LoggerArg[]] | [LoggerLevel, string] | [LoggerLevel, string, LoggerArg[]];
interface Options {
    prefix?: string;
    timestamp?: boolean | (() => string);
}
export declare abstract class BaseLogger {
    constructor(options?: Options);
    /*** Public ***/
    setOptions(options: Options): void;
    /*** Protected ***/
    protected options: Options;
    protected format(...args: FormatArgs): string;
    protected sprintf(message: string, args: LoggerArg[]): any;
    /*** Private ***/
    private extractFormatArgs;
    private isSprintfError;
}
export {};