import * as winston from "winston";
export declare let loggers: winston.Logger[];
export type ActionheroLogLevel = "emerg" | "alert" | "crit" | "error" | "warning" | "notice" | "info" | "debug";
/**
 * Log a message, with optional metadata.  The message can be logged to a number of locations (stdio, files, etc) as configured via config/logger.js
 *
 * The most basic use.  Will assume 'info' as the severity: `log('hello')`
 * Custom severity: `log('OH NO!', 'warning')`
 * Custom severity with a metadata object: `log('OH NO, something went wrong', 'warning', { error: new Error('things are busted') })`
 *
 * The default log levels are: `emerg: 0, alert: 1, crit: 2,  error: 3,  warning: 4,  notice: 5, info: 6, debug: 7`.
 * Logging levels in winston conform to the severity ordering specified by RFC5424: severity of all levels is assumed to be numerically ascending from most important to least important.
 * Learn more at https://github.com/winstonjs/winston
 */
export declare function log(message: string, severity?: ActionheroLogLevel, data?: any): void;