/**
 * Counts the verses in a formatted Haftarah citation string such as
 * `'Isaiah 6:1-7:6, 9:5-6'` or `'Genesis 21:1-34; Numbers 29:1-6'`, parsing
 * the book names and verse ranges. A bare reference like `'Jeremiah 3:4'`
 * counts as one verse.
 * @param haftara a formatted Haftarah citation
 * @returns the total number of verses, or `undefined` if none could be parsed
 */
export declare function calculateHaftarahNumVerses(haftara: string): number | undefined;