import { LogLevel, PickerLogger } from './picker-logger';
/**
 * 默认日志实现
 *
 * @example
 * ```ts
 * import { DefaultLogger, LogLevel, PickerConfig } from '\@picker/core';
 *
 * export config: PickerConfig = {
 *     // ...
 *     logger: new DefaultLogger({ level: LogLevel.Debug, timestamp: false }),
 * }
 * ```
 */
export declare class DefaultLogger implements PickerLogger {
    /** @internal */
    level: LogLevel;
    private readonly timestamp;
    private defaultContext;
    private readonly localeStringOptions;
    private static originalLogLevel;
    constructor(options?: {
        level?: LogLevel;
        timestamp?: boolean;
    });
    /**
     * @description
     * 在启动AppModule时隐藏Nest生成的信息层日志的解决方案。
     * 在“bootstrap()”函数中调用“NestFactory.create()”之前直接运行。
     *
     * See https://github.com/nestjs/nest/issues/1838
     * @internal
     */
    static hideNestBoostrapLogs(): void;
    /**
     * @description
     *如果日志级别被' hideNestBoostrapLogs() '更改，则此方法将恢复
     *原始日志级别。方法中的“NestFactory.create()”调用后直接运行
     *的引导()函数。
     *
     * See https://github.com/nestjs/nest/issues/1838
     * @internal
     */
    static restoreOriginalLogLevel(): void;
    setDefaultContext(defaultContext: string): void;
    error(message: string, context?: string, trace?: string | undefined): void;
    warn(message: string, context?: string): void;
    info(message: string, context?: string): void;
    verbose(message: string, context?: string): void;
    debug(message: string, context?: string): void;
    private logMessage;
    private logContext;
    private logTimestamp;
    private ensureString;
}