modified

build/node_modules/webpack-sources/lib/Source.js

@@ -0,0 +1,38 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+class Source {
+	source() {
+		throw new Error("Abstract");
+	}
+
+	buffer() {
+		const source = this.source();
+		if (Buffer.isBuffer(source)) return source;
+		return Buffer.from(source, "utf-8");
+	}
+
+	size() {
+		return this.buffer().length;
+	}
+
+	map(options) {
+		return null;
+	}
+
+	sourceAndMap(options) {
+		return {
+			source: this.source(),
+			map: this.map(options)
+		};
+	}
+
+	updateHash(hash) {
+		throw new Error("Abstract");
+	}
+}
+
+module.exports = Source;