export declare class ChapterKey {
    value: string;
    static getRootChapter(input: ChapterKey): string;
    static getNumbering(input: ChapterKey): string;
    static generateParentKey(input: ChapterKey): ChapterKey | undefined;
    static generateYoungerSiblingKey(input: ChapterKey): ChapterKey | undefined;
    constructor(value: string);
    static _chapterSynonyms: string[];
    static chapterSynonyms: string[];
    static splitAtChapterSynonym(input: ChapterKey): string[];
    static getChapterSynonym(input: ChapterKey): string | undefined;
}