/**
 * Represents an event subscription, and a safe way to cancel it.
 *
 * @see {@link cancel}
 */
export declare class Subscription {
    /**
     * @hidden
     */
    private _cancel;
    /**
     * Subscription's `name` option, if it was set with method {@link SubEvent.subscribe}.
     */
    readonly name?: string;
    /**
     * @hidden
     */
    constructor(init: {
        cancel: () => void;
        sub: {
            cancel: () => void;
            name?: string;
        };
    });
    /**
     * Indicates whether the subscription is live / active.
     *
     * It can be useful to subscribers when {@link SubEvent.cancelAll} is used without their knowledge.
     */
    get live(): boolean;
    /**
     * Cancels the live subscription. The subscriber won't receive any more events.
     *
     * It also sets flag {@link live} to `false`.
     *
     * @returns
     * - `true` - subscription has been successfully cancelled
     * - `false` - nothing happened, as subscription wasn't live
     *
     * @see {@link SubEvent.cancelAll}
     */
    cancel(): boolean;
}