export interface Message {
    readonly action: string;
    readonly message: string;
}
export declare class Log {
    service: SyncLoggingService;
    constructor(service: SyncLoggingService);
    private log;
    error(message: string): void;
    warning(message: string): void;
    info(message: string): void;
    debug(message: string): void;
}
/**
 *  Synchronously logs messages and notifies consumers.
 */
export declare class SyncLoggingService {
    private _log;
    private _consumers;
    readonly log: Log;
    /**
     *  Constructor
     */
    constructor();
    /**
     *  Connects a consumer to the services
     */
    connect(name: string, callback: (action: string, message: string) => void): void;
    /**
     *  Disconnects a consumer from the services
     */
    disconnect(name: string): boolean;
    /**
     *  Notify the user via the snackbar.
     */
    notify(message: Message): void;
}