import type { PDFDocument } from 'pdf-lib';
type PDFOutlineTo = number | [pageIndex: number, xPercentage: number, yPercentage: number];
export interface PDFOutlineItem {
    title: string;
    to: PDFOutlineTo;
    italic?: boolean;
    bold?: boolean;
}
export interface PDFOutlineItemWithChildren extends Omit<PDFOutlineItem, 'to'> {
    to?: PDFOutlineTo;
    children: PDFOutline[];
    open: boolean;
}
export type PDFOutline = PDFOutlineItem | PDFOutlineItemWithChildren;
export declare const setOutline: (doc: PDFDocument, outlines: readonly PDFOutline[]) => Promise<void>;
export {};