export declare const MousePositionSystem: {
    key: symbol;
    priority: number | import("@chantey/ecs").AnySystemDefinition;
    init: import("@chantey/ecs").InitSystem<import("@chantey/ecs").World<any>, {
        start: () => void;
        init: () => import("@chantey/ecs").EntityProxy;
        stop: () => void;
    }>;
};