/**
 * Compute Levenshtein (edit) distance between two strings.
 * Used for closest-match suggestions on invalid inputs.
 */
export declare function levenshteinDistance(a: string, b: string): number;
/**
 * Get the top N closest-match suggestions for an invalid value.
 */
export declare function getClosestMatches(value: string, validValues: string[], topN?: number): string[];
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