import { Gltf2Node } from "./immersive-web/render/nodes/gltf2";
import { Node } from "./immersive-web/render/core/node";
declare type SessionHitTestOptions = {
    showTarget: boolean;
    targetImageUrl?: string;
    onHitTest?: (matrix: Float32Array | null) => void;
};
declare type SessionOptions = {
    hitTestOptions?: SessionHitTestOptions;
};
export declare const startSession: (options?: SessionOptions | undefined) => Promise<XRSession | undefined>;
export declare const endSession: () => void;
export declare const enableStats: (enabled: boolean) => void;
export declare const addImage: (imageNode: Gltf2Node, includeShadow?: boolean | undefined) => Gltf2Node | Node | undefined;
export declare const removeImage: (imageNode: Gltf2Node | Node) => void;
export {};