text: 'use strict';
  var isPlainObj = require('is-plain-obj');
  
  module.exports = function (obj, opts) {
  	if (!isPlainObj(obj)) {
  		throw new TypeError('Expected a plain object');
  	}
  
  	opts = opts || {};
  
  	// DEPRECATED
  	if (typeof opts === 'function') {
  		opts = {compare: opts};
  	}
  
  	var deep = opts.deep;
  
  	var sortKeys = function (x) {
  		var ret = {};
  		var keys = Object.keys(x).sort(opts.compare);
  
  		for (var i = 0; i < keys.length; i++) {
  			var key = keys[i];
  			var val = x[key];
  
  			ret[key] = deep && val !== x && isPlainObj(val) ? sortKeys(val) : val;
  		}
  
  		return ret;
  	};
  
  	return sortKeys(obj);
  };
  