import type { Component } from 'vue';
export declare function isNumeric(val: number | string): val is string;
export declare function mountComponent<T>(RootComponent: Component): {
    instance: T;
    unmount(): void;
};
export declare function omit<T extends Record<string, unknown>, U extends keyof T>(obj: T, keys: ReadonlyArray<U>): T;
export declare function pick<T extends Record<string, unknown>, U extends keyof T>(obj: T, keys: ReadonlyArray<U>): Pick<T, U>;
export declare function createNamespace(name: string): [string, (...mods: string[]) => string];