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diff --git a/node_modules/espower-location-detector/index.js b/node_modules/espower-location-detector/index.js
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+++ b/node_modules/espower-location-detector/index.js
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+/**
+ * espower-location-detector:
+ *   AST source location detection helper for power-assert
+ * 
+ * https://github.com/twada/espower-location-detector
+ *
+ * Copyright (c) 2015-2016 Takuto Wada
+ * Licensed under the MIT license.
+ *   https://github.com/twada/espower-location-detector/blob/master/LICENSE
+ */
+'use strict';
+
+var PositionDetector = require('./lib/position-detector');
+var SourceAdjuster = require('./lib/source-adjuster');
+
+function EspowerLocationDetector (options) {
+    this.positionDetector = new PositionDetector(options.sourceMap);
+    this.sourceAdjuster = new SourceAdjuster(options.sourceRoot, options.path, options.sourceMap);
+}
+
+EspowerLocationDetector.prototype.locationFor = function (currentNode) {
+    var pos = this.positionDetector.positionFor(currentNode);
+    return {
+        source: this.sourceAdjuster.relativize(pos.source, pos.mapped),
+        line: pos.line,
+        column: pos.column
+    };
+};
+
+module.exports = EspowerLocationDetector;