/**
 * Map action creator to it's contained action type
 * @description it gets an object with at least a type property or overridden toString method and returns it.
 * @example
 * const increment = createActionCreator('[Counter] increment')
 * getType(increment) //=> '[Counter] increment'
 * @example
 * getType({ type: 'TEST' }) //=> 'TEST'
 * @example
 * getType({
 *  toString() { return 'TEST' }
 * }) //=> 'TEST'
 */
export declare function getType<TActionCreator extends {
    type?: string;
    toString(): string;
} | {
    type: string;
}, TType extends string = TActionCreator extends {
    type: infer T;
} ? T : TActionCreator extends {
    toString(): infer U;
} ? U : never>(actionCreator: TActionCreator): TType;