/**
 * @description Get the number of unique chars in a given string
 * @param {!string} str string
 * @param {string[]} [charsToExclude=[]]
 * @returns {number}
 */
export declare function stringCharDiversity(str: string, charsToExclude?: Iterable<string>): number;
/**
 * @description Analyze a given string an give it a suspicion score (higher than 1 or 2 mean that the string is highly suspect).
 */
export declare function stringSuspicionScore(str: string): number;
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