public/ckeditor/_source/plugins/undo/plugin.js
function()
		{
			if ( this.undoable() )
			{
				this.save( true );

				var image = this.getNextImage( true );
				if ( image )
					return this.restoreImage( image ), true;
			}

			return false;
		}
function()
		{
			if ( this.undoable() )
			{
				this.save( true );

				var image = this.getNextImage( true );
				if ( image )
					return this.restoreImage( image ), true;
			}

			return false;
		}
function ( ) { if ( this . undoable ( ) ) { this . save ( true ) ; var image = this . getNextImage ( true ) ; if ( image ) return this . restoreImage ( image ) , true ; } return false ; }
Perform undo on current index.
Perform undo on current index .