type Callback<E> = (args: E) => void;
/**
 * MachineConnectionEvent events are emitted by a Client's EventDispatcher when connection events
 * occur.
 */
export declare enum MachineConnectionEvent {
    CONNECTING = "connecting",
    CONNECTED = "connected",
    DISCONNECTING = "disconnecting",
    DISCONNECTED = "disconnected",
    DIALING = "dialing",
    RECONNECTING = "reconnecting",
    RECONNECTION_FAILED = "reconnection_failed"
}
export declare class EventDispatcher<Events extends object> {
    listeners: Partial<{
        [K in keyof Events]: Set<Callback<Events[K]>>;
    }>;
    on<K extends keyof Events & string>(type: K, listener: Callback<Events[K]>): void;
    once<K extends keyof Events & string>(type: K, listener: Callback<Events[K]>): void;
    has<K extends keyof Events & string>(type: K, listener: Callback<Events[K]>): boolean | undefined;
    off<K extends keyof Events & string>(type: K, listener: Callback<Events[K]>): void;
    emit<K extends keyof Events & string>(type: K, args: Events[K]): void;
}
export {};