import { LinkNode } from '@lexical/link';
import { type LexicalEditor } from 'lexical';
export declare function isValidUrl(url: string): boolean;
export declare const safeParseJSON: (json: string, defaultValue?: any) => any;
export declare const getBlockletMountPointInfo: (name: string) => any;
export declare const discussKitMountPoint: any;
export declare const discussKitUploadsUrl: string;
export declare const blockletExists: (name: string) => boolean;
export declare const fetchOpenGraphInfo: (openGraphEndpoint: string, url: string) => Promise<{
    url: any;
    title: any;
    description: any;
    image: any;
    favicon: any;
} | null>;
export declare const $getLinkNode: (editor: LexicalEditor) => LinkNode | null;
export declare const sleep: (ms: number) => Promise<unknown>;
export declare const minDelay: <T>(promise: Promise<T>, ms: number) => Promise<T>;
export declare function exhaustiveGuard(_value: never): never;
export declare const isSameHost: (url: string | URL) => boolean;
export declare const isBlockletRunning: (name: string) => boolean;