import { EventCreator } from '../interfaces';
import { Reducer } from '../types';
import { ActorEvent } from '../types/actor-event.type';
/**
 * Model to create reducers
 */
export declare class ReducerBuilder<S> {
    /**
     * Keeps track of reducers
     */
    private readonly state;
    /**
     * Adds a case to the reducer to match a particular type
     * @param typeOrHasType a string or object / function containing a type property
     * @param reducer a reducer function with the form of `(state: S, event: Event) => S`
     * @returns the current reducer builder instance (allows chaining)
     */
    addCase<T>(typeOrHasType: EventCreator<T> | EventCreator<T>[] | string | string[], reducer: Reducer<S, ActorEvent<T>>): this;
    /**
     * Immutable reducers instance
     */
    get reducers(): Map<string, Reducer<S, ActorEvent<any>>>;
}