import type { Result } from '@chzky/core';
import type { Draft, Immutable } from '../../../mod.js';
import { IllegalOperatError } from '@chzky/core';
export declare function immut_produce<T, R = void>(data: Immutable<T>, fn: (draft: Draft<T>) => R): Result<Immutable<R extends void ? T : R>, IllegalOperatError>;
//# sourceMappingURL=core.d.ts.map