import { PdfDictionary } from '../../core/objects/pdf-dictionary.js';
import { PdfStream } from '../../core/objects/pdf-stream.js';
import { PdfIndirectObject } from '../../core/objects/pdf-indirect-object.js';
import { PdfGraphics } from './pdf-graphics.js';
/**
 * Base class for PDF appearance streams (Form XObjects).
 * Wraps a PdfStream as a PdfIndirectObject so it can be added directly to a document.
 */
export declare class PdfAppearanceStream extends PdfIndirectObject<PdfStream> {
    constructor(options: {
        x?: number;
        y?: number;
        width?: number;
        height?: number;
        contentStream?: string;
        resources?: PdfDictionary;
    });
    get contentStream(): string;
    set contentStream(newContent: string);
    set graphics(g: PdfGraphics);
}