import { type Component } from 'vue';
export declare function useOptionalComponent(component: string | Component | undefined, defaultComponent: Component): import("vue").ComputedRef<string | {
    new (...args: any[]): any;
    __isFragment?: never;
    __isTeleport?: never;
    __isSuspense?: never;
} | import("vue").ComponentOptions<{}, any, any, import("vue").ComputedOptions, import("vue").MethodOptions, any, any, any, string, {}, {}, string, {}, {}, {}, string, import("vue").ComponentProvideOptions> | import("vue").FunctionalComponent<{}, {}, any, {}>>;