added originalSource method to NormalModule (closes webpack#4526)

Sergey Melyukov · Sergey Melyukov · commit 9d8d32e1ed11 · 2017-04-03T10:33:11.000+03:00
diff --git a/lib/NormalModule.js b/lib/NormalModule.js
@@ -456,6 +456,10 @@ class NormalModule extends Module {
 		return new CachedSource(source);
 	}
 
+    originalSource() {
+        return this._source;
+    }
+
 	getHighestTimestamp(keys, timestampsByKey) {
 		let highestTimestamp = 0;
 		for(let i = 0; i < keys.length; i++) {
