export interface SubjectLikeItem {
    answerType: string;
    customId?: string;
    pageIndex?: number;
    [key: string]: any;
}
export interface PageBreakItem extends SubjectLikeItem {
    answerType: 'page_end';
    customId: string;
}
export interface PaginationMetaItem {
    customId: string;
    currentPageIndex: number;
    totalPage: number;
    itemIndex: number;
}
export declare function isPageBreakItem(item: SubjectLikeItem | null | undefined): item is PageBreakItem;
export declare function normalizePageBreaks(items: SubjectLikeItem[]): SubjectLikeItem[];
export declare function rebuildPageBreaksFromPageIndex(items: SubjectLikeItem[]): SubjectLikeItem[];
export declare function serializeSubjectsWithPageIndex(items: SubjectLikeItem[]): SubjectLikeItem[];
export declare function insertPageBreak(items: SubjectLikeItem[], index?: number): SubjectLikeItem[];
export declare function removePageBreak(items: SubjectLikeItem[], customId: string): SubjectLikeItem[];
export declare function getPaginationMeta(items: SubjectLikeItem[]): PaginationMetaItem[];