AvalonStudio.TextEditor.Document.UndoStack.EndUndoGroup C# (CSharp) Method

		public void EndUndoGroup()
		{
			if (undoGroupDepth == 0) throw new InvalidOperationException("There are no open undo groups");
			undoGroupDepth--;
			//Util.LoggingService.Debug("Close undo group (new depth=" + undoGroupDepth + ")");
			if (undoGroupDepth == 0)
			{
				Debug.Assert(state == StateListen || actionCountInUndoGroup == 0);
				allowContinue = true;
				if (actionCountInUndoGroup == optionalActionCount)
				{
					// only optional actions: don't store them
					for (var i = 0; i < optionalActionCount; i++)
					{
						undostack.PopBack();
					}
					allowContinue = false;
				}
				else if (actionCountInUndoGroup > 1)
				{
					// combine all actions within the group into a single grouped action
					undostack.PushBack(new UndoOperationGroup(undostack, actionCountInUndoGroup));
					FileModified(-actionCountInUndoGroup + 1 + optionalActionCount);
				}
				//if (state == StateListen) {
				EnforceSizeLimit();
				RecalcIsOriginalFile(); // can raise event
				//}
			}
		}