expose classes needed to create a custom module type

lib/index.js

@@ -154,6 +154,9 @@ module.exports = mergeExports(fn, {
 	get Generator() {
 		return require("./Generator");
 	},
+	get HotUpdateChunk() {
+		return require("./HotUpdateChunk");
+	},
 	get HotModuleReplacementPlugin() {
 		return require("./HotModuleReplacementPlugin");
 	},
@@ -351,6 +354,9 @@ module.exports = mergeExports(fn, {
 	},
 
 	runtime: {
+		get GetChunkFilenameRuntimeModule() {
+			return require("./runtime/GetChunkFilenameRuntimeModule");
+		},
 		get LoadScriptRuntimeModule() {
 			return require("./runtime/LoadScriptRuntimeModule");
 		}

types.d.ts

@@ -3510,6 +3510,23 @@ declare class Generator {
 	updateHash(hash: Hash, __1: UpdateHashContextGenerator): void;
 	static byType(map?: any): ByTypeGenerator;
 }
+declare class GetChunkFilenameRuntimeModule extends RuntimeModule {
+	constructor(
+		contentType: string,
+		name: string,
+		global: string,
+		getFilenameForChunk: (
+			arg0: Chunk
+		) => string | ((arg0: PathData, arg1: AssetInfo) => string),
+		allChunks: boolean
+	);
+	contentType: string;
+	global: string;
+	getFilenameForChunk: (
+		arg0: Chunk
+	) => string | ((arg0: PathData, arg1: AssetInfo) => string);
+	allChunks: boolean;
+}
 declare interface GroupConfig<T, R> {
 	getKeys: (arg0: T) => string[];
 	createGroup: (arg0: string, arg1: (T | R)[], arg2: T[]) => R;
@@ -3581,6 +3598,9 @@ declare class HotModuleReplacementPlugin {
 	apply(compiler: Compiler): void;
 	static getParserHooks(parser: JavascriptParser): HMRJavascriptParserHooks;
 }
+declare class HotUpdateChunk extends Chunk {
+	constructor();
+}
 declare class HttpUriPlugin {
 	constructor();
 
@@ -9961,7 +9981,7 @@ declare namespace exports {
 		};
 	}
 	export namespace runtime {
-		export { LoadScriptRuntimeModule };
+		export { GetChunkFilenameRuntimeModule, LoadScriptRuntimeModule };
 	}
 	export namespace prefetch {
 		export { ChunkPrefetchPreloadPlugin };
@@ -10144,6 +10164,7 @@ declare namespace exports {
 		ExternalModule,
 		ExternalsPlugin,
 		Generator,
+		HotUpdateChunk,
 		HotModuleReplacementPlugin,
 		IgnorePlugin,
 		JavascriptModulesPlugin,