import type { PDFRef } from '../core/pdf-ref.ts';
import type { PDFContext } from './pdf-context.ts';
export declare abstract class PDFResource {
    /**
     * A unique key that identifies the resource.
     */
    abstract readonly key: string;
    /**
     * Registers the resource in the given PDF context.
     * This method is called during the serialization process.
     * @internal
     */
    abstract register(context: PDFContext): PDFRef;
}