1 files changed, 35 insertions, 0 deletions
diff --git a/node_modules/webpack/lib/util/TrackingSet.js b/node_modules/webpack/lib/util/TrackingSet.js
new file mode 100644
index 0000000..b52a440
--- /dev/null
+++ b/node_modules/webpack/lib/util/TrackingSet.js
@@ -0,0 +1,35 @@
+/*
+	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;
+	}
+};