First commit

node_modules/webpack/lib/util/TrackingSet.js

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+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+module.exports = class TrackingSet {
+	constructor(set) {
+		this.set = set;
+		this.set2 = new Set();
+		this.stack = set.stack;
+	}
+
+	add(item) {
+		this.set2.add(item);
+		return this.set.add(item);
+	}
+
+	delete(item) {
+		this.set2.delete(item);
+		return this.set.delete(item);
+	}
+
+	has(item) {
+		return this.set.has(item);
+	}
+
+	createChild() {
+		return this.set.createChild();
+	}
+
+	getAddedItems() {
+		return this.set2;
+	}
+};