import { Subscriber } from "../_core";
import { AnyEvent } from "../_interfaces";
import { Activation, Root } from "./_base";
export declare abstract class TimerBase<T> extends Root<T> {
    readonly interval: number;
    constructor(interval: number);
    abstract tick(): Array<AnyEvent<T>>;
    protected create(subscriber: Subscriber<T>): Activation<T, TimerBase<T>>;
}