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diff --git a/contexts/data/lib/closure-library/closure/goog/editor/plugins/undoredostate.js b/contexts/data/lib/closure-library/closure/goog/editor/plugins/undoredostate.js
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--- a/contexts/data/lib/closure-library/closure/goog/editor/plugins/undoredostate.js
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@@ -1,84 +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 Code for an UndoRedoState interface representing an undo and
- * redo action for a particular state change. To be used by
- * {@link goog.editor.plugins.UndoRedoManager}.
- *
- */
-
-
-goog.provide('goog.editor.plugins.UndoRedoState');
-
-goog.require('goog.events.EventTarget');
-
-
-
-/**
- * Represents an undo and redo action for a particular state transition.
- *
- * @param {boolean} asynchronous Whether the undo or redo actions for this
- * state complete asynchronously. If true, then this state must fire
- * an ACTION_COMPLETED event when undo or redo is complete.
- * @constructor
- * @extends {goog.events.EventTarget}
- */
-goog.editor.plugins.UndoRedoState = function(asynchronous) {
- /**
- * Indicates if the undo or redo actions for this state complete
- * asynchronously.
- * @type {boolean}
- * @private
- */
- this.asynchronous_ = asynchronous;
-};
-goog.inherits(goog.editor.plugins.UndoRedoState, goog.events.EventTarget);
-
-
-/**
- * Event type for events indicating that this state has completed an undo or
- * redo operation.
- */
-goog.editor.plugins.UndoRedoState.ACTION_COMPLETED = 'action_completed';
-
-
-/**
- * @return {boolean} Whether or not the undo and redo actions of this state
- * complete asynchronously. If true, the state will fire an ACTION_COMPLETED
- * event when an undo or redo action is complete.
- */
-goog.editor.plugins.UndoRedoState.prototype.isAsynchronous = function() {
- return this.asynchronous_;
-};
-
-
-/**
- * Undoes the action represented by this state.
- */
-goog.editor.plugins.UndoRedoState.prototype.undo = goog.abstractMethod;
-
-
-/**
- * Redoes the action represented by this state.
- */
-goog.editor.plugins.UndoRedoState.prototype.redo = goog.abstractMethod;
-
-
-/**
- * Checks if two undo-redo states are the same.
- * @param {goog.editor.plugins.UndoRedoState} state The state to compare.
- * @return {boolean} Wether the two states are equal.
- */
-goog.editor.plugins.UndoRedoState.prototype.equals = goog.abstractMethod;