import { Ref } from 'vue';
import { ObservedEngine } from "../symbols.js";
interface SageEngineContext {
    engine: Readonly<Ref<ObservedEngine | null>>;
}
/**
 * Answers with the engine the canvas above provides, in the `Ref` the canvas holds it in, so a component
 * reads it before there is an engine and sees the one that arrives. The bus is the engine's, one per engine,
 * and a UI takes it from the engine it already holds (design/ui.md#reaching-the-engine).
 */
export declare function useSageEngine(): SageEngineContext;
export {};