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node_modules/webpack/lib/FlagInitialModulesAsUsedPlugin.js

@@ -5,19 +5,31 @@
 "use strict";
 
 class FlagInitialModulesAsUsedPlugin {
+	constructor(explanation) {
+		this.explanation = explanation;
+	}
+
 	apply(compiler) {
-		compiler.plugin("compilation", (compilation) => {
-			compilation.plugin("after-optimize-chunks", (chunks) => {
-				chunks.forEach((chunk) => {
-					if(!chunk.isInitial()) {
-						return;
+		compiler.hooks.compilation.tap(
+			"FlagInitialModulesAsUsedPlugin",
+			compilation => {
+				compilation.hooks.afterOptimizeChunks.tap(
+					"FlagInitialModulesAsUsedPlugin",
+					chunks => {
+						for (const chunk of chunks) {
+							if (!chunk.isOnlyInitial()) {
+								return;
+							}
+							for (const module of chunk.modulesIterable) {
+								module.used = true;
+								module.usedExports = true;
+								module.addReason(null, null, this.explanation);
+							}
+						}
 					}
-					chunk.forEachModule((module) => {
-						module.usedExports = true;
-					});
-				});
-			});
-		});
+				);
+			}
+		);
 	}
 }