import { Physics, Scene, WASM, WonderlandEngine, XRSessionState } from "@wonderlandengine/api";
export declare function getMainEngine(): WonderlandEngine | null;
export declare function setMainEngine(engine: WonderlandEngine): void;
export declare function removeMainEngine(): void;
export declare function getEngines(): WonderlandEngine[];
export declare function addEngine(engine: WonderlandEngine): void;
export declare function removeEngine(engine: Readonly<WonderlandEngine>): void;
export declare function hasEngine(engine: Readonly<WonderlandEngine>): boolean;
export declare function getScene(): Scene | null;
export declare function getScene(engine: Readonly<WonderlandEngine>): Scene;
export declare function getPhysics(): Physics | null;
export declare function getPhysics(engine: Readonly<WonderlandEngine>): Physics;
export declare function getCanvas(): HTMLCanvasElement | null;
export declare function getCanvas(engine: Readonly<WonderlandEngine>): HTMLCanvasElement;
export declare function getWASM(): WASM | null;
export declare function getWASM(engine: Readonly<WonderlandEngine>): WASM;
export declare function getXR(): XRSessionState | null;
export declare function getXR(engine: Readonly<WonderlandEngine>): XRSessionState;