import type { Rspack } from '@rslib/core';
/**
 * Marks the assets of every chunk holding main-thread modules, the way a page
 * build marks its own, so the encoder and the runtime wrapper tell the threads
 * apart by the same mark.
 */
export declare class MarkMainThreadWebpackPlugin {
    private options;
    constructor(options: {
        layer: string;
    });
    apply(compiler: Rspack.Compiler): void;
}