import { Action, ReducerTypes, ActionReducer, ActionCreator, ActionType } from '@ngrx/store';
import { Draft } from 'immer';
/**
 * An immer reducer that allows a void return
 */
export interface ImmerOnReducer<State, AC extends ActionCreator[]> {
    (state: Draft<State>, action: ActionType<AC[number]>): void;
}
/**
 * Immer wrapper around `on` to mutate state
 */
export declare function immerOn<State, Creators extends ActionCreator[]>(...args: [...creators: Creators, reducer: ImmerOnReducer<State, Creators>]): ReducerTypes<State, Creators>;
/**
 * Immer wrapper around `createReducer` to mutate state
 */
export declare function createImmerReducer<State, A extends Action = Action>(initialState: State, ...ons: ReducerTypes<State, any>[]): ActionReducer<State, A>;