import { System } from "./System";
import { ActivityViaViewportComponent } from "../Components/ActivityViaViewportComponent";
export declare class ActivityViaViewportSystem extends System {
    constructor();
    static onAwake(_component: ActivityViaViewportComponent): void;
    static onStep(_dt: number, _component: ActivityViaViewportComponent): void;
    static onDestroy(_component: ActivityViaViewportComponent): void;
    static onEnable(_component: ActivityViaViewportComponent): void;
    static onDisable(_component: ActivityViaViewportComponent): void;
}