import ObjectManager from "../display/core/ObjectManager";
export declare const flySystem: {
    add: ((item: ObjectManager<import("three").Object3D<import("three").Event>>, initData?: {
        downSet: Set<string>;
    } | undefined) => false | import("@lincode/promiselikes").Cancellable) | ((item: ObjectManager<import("three").Object3D<import("three").Event>>, initData?: {
        downSet: Set<string>;
    } | undefined) => boolean);
    delete: ((item: ObjectManager<import("three").Object3D<import("three").Event>>) => false | import("@lincode/promiselikes").Cancellable | undefined) | ((item: ObjectManager<import("three").Object3D<import("three").Event>>) => boolean);
};