import { Ref } from '../ref.js';
import { PdfToken } from '../tokens/token.js';
import { PdfNumber } from './pdf-number.js';
import { PdfObject } from './pdf-object.js';
export declare class PdfStartXRef extends PdfObject {
    offset: PdfNumber;
    constructor(offset?: number | PdfNumber | Ref<number>);
    toJSON(): {
        type: string;
        offset: number;
    };
    protected tokenize(): PdfToken[];
    cloneImpl(): this;
    setModified(modified?: boolean): void;
    isModified(): boolean;
}