import { PDFObject } from './pdf-object.ts';
import type { PDFWriter } from './pdf-writer.ts';
/**
 * Represents the PDF null object. Use the singleton instance `PDFNull.Null`.
 */
export declare class PDFNull extends PDFObject {
    /**
     * Represents the singleton instance of PDFNull.
     */
    static readonly Null: PDFNull;
    private constructor();
    /**
     * Writes the PDF null object to the given PDFWriter.
     */
    write(writer: PDFWriter): void;
}