import { FException } from "../exception/index.js";
import { FExecutionContext } from "../execution_context/index.js";
import { FChannelSubscriber } from "./FChannelSubscriber.js";
export declare class FChannelSubscriberMixin<TData, TEvent extends FChannelSubscriber.Event<TData> = FChannelSubscriber.Event<TData>> implements FChannelSubscriber<TData, TEvent> {
    private __callbacks?;
    private __broken?;
    static applyMixin(targetClass: any): void;
    addHandler(cb: FChannelSubscriber.Callback<TData, TEvent>): void;
    removeHandler(cb: FChannelSubscriber.Callback<TData, TEvent>): void;
    protected get isBroken(): boolean;
    protected verifyBrokenChannel(): void;
    protected notify(executionContext: FExecutionContext, event: TEvent | FException): void | Promise<void>;
    protected get hasSubscribers(): boolean;
    protected onAddFirstHandler(): void;
    protected onRemoveLastHandler(): void;
    private constructor();
}