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diff --git a/src/assets/viz/1/goog/string/stringbuffer.js b/src/assets/viz/1/goog/string/stringbuffer.js
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+++ b/src/assets/viz/1/goog/string/stringbuffer.js
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+// Copyright 2006 The Closure Library Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @fileoverview Utility for fast string concatenation.
+ */
+
+goog.provide('goog.string.StringBuffer');
+
+
+
+/**
+ * Utility class to facilitate string concatenation.
+ *
+ * @param {*=} opt_a1 Optional first initial item to append.
+ * @param {...*} var_args Other initial items to
+ *     append, e.g., new goog.string.StringBuffer('foo', 'bar').
+ * @constructor
+ */
+goog.string.StringBuffer = function(opt_a1, var_args) {
+  if (opt_a1 != null) {
+    this.append.apply(this, arguments);
+  }
+};
+
+
+/**
+ * Internal buffer for the string to be concatenated.
+ * @type {string}
+ * @private
+ */
+goog.string.StringBuffer.prototype.buffer_ = '';
+
+
+/**
+ * Sets the contents of the string buffer object, replacing what's currently
+ * there.
+ *
+ * @param {*} s String to set.
+ */
+goog.string.StringBuffer.prototype.set = function(s) {
+  this.buffer_ = '' + s;
+};
+
+
+/**
+ * Appends one or more items to the buffer.
+ *
+ * Calling this with null, undefined, or empty arguments is an error.
+ *
+ * @param {*} a1 Required first string.
+ * @param {*=} opt_a2 Optional second string.
+ * @param {...?} var_args Other items to append,
+ *     e.g., sb.append('foo', 'bar', 'baz').
+ * @return {!goog.string.StringBuffer} This same StringBuffer object.
+ * @suppress {duplicate}
+ */
+goog.string.StringBuffer.prototype.append = function(a1, opt_a2, var_args) {
+  // Use a1 directly to avoid arguments instantiation for single-arg case.
+  this.buffer_ += String(a1);
+  if (opt_a2 != null) {  // second argument is undefined (null == undefined)
+    for (var i = 1; i < arguments.length; i++) {
+      this.buffer_ += arguments[i];
+    }
+  }
+  return this;
+};
+
+
+/**
+ * Clears the internal buffer.
+ */
+goog.string.StringBuffer.prototype.clear = function() {
+  this.buffer_ = '';
+};
+
+
+/**
+ * @return {number} the length of the current contents of the buffer.
+ */
+goog.string.StringBuffer.prototype.getLength = function() {
+  return this.buffer_.length;
+};
+
+
+/**
+ * @return {string} The concatenated string.
+ * @override
+ */
+goog.string.StringBuffer.prototype.toString = function() {
+  return this.buffer_;
+};