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diff --git a/contexts/data/lib/closure-library/closure/goog/proto2/descriptor.js b/contexts/data/lib/closure-library/closure/goog/proto2/descriptor.js
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--- a/contexts/data/lib/closure-library/closure/goog/proto2/descriptor.js
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@@ -1,200 +0,0 @@
-// Copyright 2008 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 Protocol Buffer (Message) Descriptor class.
- */
-
-goog.provide('goog.proto2.Descriptor');
-goog.provide('goog.proto2.Metadata');
-
-goog.require('goog.array');
-goog.require('goog.object');
-goog.require('goog.proto2.Util');
-
-
-/**
- * @typedef {{name: (string|undefined),
- * fullName: (string|undefined),
- * containingType: (goog.proto2.Message|undefined)}}
- */
-goog.proto2.Metadata;
-
-
-
-/**
- * A class which describes a Protocol Buffer 2 Message.
- *
- * @param {function(new:goog.proto2.Message)} messageType Constructor for
- * the message class that this descriptor describes.
- * @param {!goog.proto2.Metadata} metadata The metadata about the message that
- * will be used to construct this descriptor.
- * @param {Array.<!goog.proto2.FieldDescriptor>} fields The fields of the
- * message described by this descriptor.
- *
- * @constructor
- */
-goog.proto2.Descriptor = function(messageType, metadata, fields) {
-
- /**
- * @type {function(new:goog.proto2.Message)}
- * @private
- */
- this.messageType_ = messageType;
-
- /**
- * @type {?string}
- * @private
- */
- this.name_ = metadata.name || null;
-
- /**
- * @type {?string}
- * @private
- */
- this.fullName_ = metadata.fullName || null;
-
- /**
- * @type {goog.proto2.Message|undefined}
- * @private
- */
- this.containingType_ = metadata.containingType;
-
- /**
- * The fields of the message described by this descriptor.
- * @type {!Object.<number, !goog.proto2.FieldDescriptor>}
- * @private
- */
- this.fields_ = {};
-
- for (var i = 0; i < fields.length; i++) {
- var field = fields[i];
- this.fields_[field.getTag()] = field;
- }
-};
-
-
-/**
- * Returns the name of the message, if any.
- *
- * @return {?string} The name.
- */
-goog.proto2.Descriptor.prototype.getName = function() {
- return this.name_;
-};
-
-
-/**
- * Returns the full name of the message, if any.
- *
- * @return {?string} The name.
- */
-goog.proto2.Descriptor.prototype.getFullName = function() {
- return this.fullName_;
-};
-
-
-/**
- * Returns the descriptor of the containing message type or null if none.
- *
- * @return {goog.proto2.Descriptor} The descriptor.
- */
-goog.proto2.Descriptor.prototype.getContainingType = function() {
- if (!this.containingType_) {
- return null;
- }
-
- return this.containingType_.getDescriptor();
-};
-
-
-/**
- * Returns the fields in the message described by this descriptor ordered by
- * tag.
- *
- * @return {!Array.<!goog.proto2.FieldDescriptor>} The array of field
- * descriptors.
- */
-goog.proto2.Descriptor.prototype.getFields = function() {
- /**
- * @param {!goog.proto2.FieldDescriptor} fieldA First field.
- * @param {!goog.proto2.FieldDescriptor} fieldB Second field.
- * @return {number} Negative if fieldA's tag number is smaller, positive
- * if greater, zero if the same.
- */
- function tagComparator(fieldA, fieldB) {
- return fieldA.getTag() - fieldB.getTag();
- };
-
- var fields = goog.object.getValues(this.fields_);
- goog.array.sort(fields, tagComparator);
-
- return fields;
-};
-
-
-/**
- * Returns the fields in the message as a key/value map, where the key is
- * the tag number of the field. DO NOT MODIFY THE RETURNED OBJECT. We return
- * the actual, internal, fields map for performance reasons, and changing the
- * map can result in undefined behavior of this library.
- *
- * @return {!Object.<number, !goog.proto2.FieldDescriptor>} The field map.
- */
-goog.proto2.Descriptor.prototype.getFieldsMap = function() {
- return this.fields_;
-};
-
-
-/**
- * Returns the field matching the given name, if any. Note that
- * this method searches over the *original* name of the field,
- * not the camelCase version.
- *
- * @param {string} name The field name for which to search.
- *
- * @return {goog.proto2.FieldDescriptor} The field found, if any.
- */
-goog.proto2.Descriptor.prototype.findFieldByName = function(name) {
- var valueFound = goog.object.findValue(this.fields_,
- function(field, key, obj) {
- return field.getName() == name;
- });
-
- return /** @type {goog.proto2.FieldDescriptor} */ (valueFound) || null;
-};
-
-
-/**
- * Returns the field matching the given tag number, if any.
- *
- * @param {number|string} tag The field tag number for which to search.
- *
- * @return {goog.proto2.FieldDescriptor} The field found, if any.
- */
-goog.proto2.Descriptor.prototype.findFieldByTag = function(tag) {
- goog.proto2.Util.assert(goog.string.isNumeric(tag));
- return this.fields_[parseInt(tag, 10)] || null;
-};
-
-
-/**
- * Creates an instance of the message type that this descriptor
- * describes.
- *
- * @return {!goog.proto2.Message} The instance of the message.
- */
-goog.proto2.Descriptor.prototype.createMessageInstance = function() {
- return new this.messageType_;
-};