export declare class IMUtils {
    static urlReg: RegExp;
    /**
     * Get all the URL from a text message
     */
    static getURLMatches(textMessage: string): string[];
    static getGroupIdByClassId: (classId: number) => string;
    static getIMId: (uid: number) => string;
    static isClassGroup: (groupId?: string) => boolean;
    static getConversationIdByClassId: (classId: number) => string;
    static getConversationIdByIMId: (imId?: string) => string;
    static getClassIdByGroupId: (groupId?: string) => number;
    static getConversationTypeByConversationId: (conversationId: string) => Promise<import("tim-js-sdk").default.TYPES.CONV_C2C | import("tim-js-sdk").default.TYPES.CONV_GROUP>;
    static getConversationIdByGroupId: (groupId?: string) => string;
    static getToByConversationId: (conversationId: string) => string;
}