import type { EntryMapItem } from '../types/types-entry-map.js';
import type { FlatEvolveOptions } from '../types/types-options.js';
/**
 * Assert the chunk filename based on the entry item and the extension.
 * If we have customized `chunkFileVirtualPath`, we will join the `chunkFileVirtualPath` and the `chunkFilename`.
 *
 * @param evolveOptions - The evolve options.
 * @param entryItem - The entry item.
 * @param extension - The extension.
 * @returns The chunk filename.
 */
export declare const assertChunkFilename: (evolveOptions: FlatEvolveOptions, entryItem: EntryMapItem, extension?: string) => string;