import { IDataHook } from "model-react";
import { IUILayer } from "../../uiLayers/_types/IUILayer";
import { IIOContext } from "../_types/IIOContext";
/**
 * Retrieves the top layer of a context
 * @param context The context to extract the layer from
 * @param hook The data hook to subscribe to changes
 * @returns The context's top layer
 */
export declare function getContextTopLayer(context: IIOContext, hook?: IDataHook): IUILayer | null;
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