/**
 * Retrieves mentions from a string and returns an object containing the message and mentions.
 * @param mentionOnFailure - The string containing the mentions.
 * @param mentionOnFailureText - Optional text to replace the mention placeholder in the message.
 * @returns An object containing the message and mentions, or undefined if no mentions are found.
 */
export declare const getMentions: (mentionOnFailure: string | undefined, mentionOnFailureText?: string) => {
    message: string;
    mentions: {
        name: string;
        email: string;
    }[];
} | undefined;