import type { EngineInternals } from './internals.ts';
export type CancelHandler = () => Promise<void> | void;
export declare function registerCancelHandler(internals: EngineInternals, workflowId: string, handler: CancelHandler): () => void;
export declare function createCancelHandlerRegistration(internals: EngineInternals, workflowId: string): (handler: CancelHandler) => () => void;
export declare function resetCancelHandlers(internals: EngineInternals, workflowId: string): void;
export declare function takeCancelHandlers(internals: EngineInternals, workflowId: string): CancelHandler[];