/**
 * The spec generates a pattern like this '^\d{3}-\d{2}-\d{4}$'
 * However, to use it in HTML or inside new RegExp() we need to
 * escape the pattern to become: '^\\d{3}-\\d{2}-\\d{4}$' in order
 * to make it a valid regexp string.
 * @param pattern
 */
export declare const getPattern: (pattern?: string | undefined) => string | undefined;