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diff --git a/node_modules/stylus/lib/nodes/arguments.js b/node_modules/stylus/lib/nodes/arguments.js
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+++ b/node_modules/stylus/lib/nodes/arguments.js
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+
+/*!
+ * Stylus - Arguments
+ * Copyright (c) Automattic <developer.wordpress.com>
+ * MIT Licensed
+ */
+
+/**
+ * Module dependencies.
+ */
+
+var Node = require('./node')
+  , nodes = require('../nodes')
+  , utils = require('../utils');
+
+/**
+ * Initialize a new `Arguments`.
+ *
+ * @api public
+ */
+
+var Arguments = module.exports = function Arguments(){
+  nodes.Expression.call(this);
+  this.map = {};
+};
+
+/**
+ * Inherit from `nodes.Expression.prototype`.
+ */
+
+Arguments.prototype.__proto__ = nodes.Expression.prototype;
+
+/**
+ * Initialize an `Arguments` object with the nodes
+ * from the given `expr`.
+ *
+ * @param {Expression} expr
+ * @return {Arguments}
+ * @api public
+ */
+
+Arguments.fromExpression = function(expr){
+  var args = new Arguments
+    , len = expr.nodes.length;
+  args.lineno = expr.lineno;
+  args.column = expr.column;
+  args.isList = expr.isList;
+  for (var i = 0; i < len; ++i) {
+    args.push(expr.nodes[i]);
+  }
+  return args;
+};
+
+/**
+ * Return a clone of this node.
+ *
+ * @return {Node}
+ * @api public
+ */
+
+Arguments.prototype.clone = function(parent){
+  var clone = nodes.Expression.prototype.clone.call(this, parent);
+  clone.map = {};
+  for (var key in this.map) {
+    clone.map[key] = this.map[key].clone(parent, clone);
+  }
+  clone.isList = this.isList;
+  clone.lineno = this.lineno;
+  clone.column = this.column;
+  clone.filename = this.filename;
+  return clone;
+};
+
+/**
+ * Return a JSON representation of this node.
+ *
+ * @return {Object}
+ * @api public
+ */
+
+Arguments.prototype.toJSON = function(){
+  return {
+    __type: 'Arguments',
+    map: this.map,
+    isList: this.isList,
+    preserve: this.preserve,
+    lineno: this.lineno,
+    column: this.column,
+    filename: this.filename,
+    nodes: this.nodes
+  };
+};