import type { ILoggerData, LogLevel } from './Logger.js';
export interface ILoggerOutputOptions {
    levels?: LogLevel[];
}
declare abstract class LoggerOutput {
    constructor(options: ILoggerOutputOptions);
    protected abstract output(log: ILoggerData): Promise<void>;
    abstract end(): Promise<void>;
    log(log: ILoggerData): void;
    private executor_;
    private next_;
    private options_;
}
export { LoggerOutput };
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