import { Designer } from '../../framework';
import { ShallowReactive, ComputedRef } from 'vue';
import { Engine, DesignHelper } from '../..';
export declare function useSelected(): {
    engine: ShallowReactive<Engine>;
    designer: ComputedRef<Designer | null>;
    selected: ComputedRef< DesignHelper | null | undefined>;
    isSelectBlock: ComputedRef<boolean>;
};