import { IObserver, TimeWheelEvent, TimeWheelEventData } from '../types';
export declare abstract class BaseObserver implements IObserver {
    protected readonly name: string;
    protected enabled: boolean;
    protected filter?: Set<TimeWheelEvent>;
    constructor(name: string, events?: TimeWheelEvent[]);
    enable(): void;
    disable(): void;
    protected shouldHandle(event: TimeWheelEvent): boolean;
    update(data: TimeWheelEventData): void;
    protected abstract handleEvent(data: TimeWheelEventData): void;
}
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