import * as Logger from './logger';
import * as Settings from './settings';
export declare type SettingsManager = Settings.Data & {
    (newSettings: Settings.Input): RootLogger;
};
export declare type Options = Settings.Input;
export declare type RootLogger = Logger.Logger & {
    settings: SettingsManager;
};
export declare type State = {
    settings: SettingsManager;
};
/**
 * Create a root logger.
 */
export declare function create(opts?: Options): RootLogger;
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