This file is indexed.

/usr/lib/nodejs/es5-ext/object/is-empty.js is in node-es5-ext 0.10.30-1.

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The actual contents of the file can be viewed below.

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"use strict";

var value                   = require("./valid-value")
  , objPropertyIsEnumerable = Object.prototype.propertyIsEnumerable;

module.exports = function (obj) {
	var i;
	value(obj);
	for (i in obj) {
		// Jslint: ignore
		if (objPropertyIsEnumerable.call(obj, i)) return false;
	}
	return true;
};