export declare type EventType = 'compile-started' | 'compile-compiled' | 'compile-errored' | 'lint-linted' | 'lint-errored' | 'format-verified' | 'format-errored' | 'source-files-changed';
export declare type Callback = () => void;
export interface Bus {
    signal(eventType: EventType): void;
    register(type: EventType, callback: Callback): void;
    registerAll(types: EventType[], callback: Callback): void;
    unregister(callback: Callback): void;
}
export declare let createBus: () => Bus;