private WritingSystemTreeItem MakeExistingDefinitionItem(IWritingSystemDefinition definition)
        {
            var item = new WritingSystemDefinitionTreeItem(definition, OnClickExistingDefinition);

            item.Selected = item.Definition == _setupModel.CurrentDefinition;
            return((WritingSystemTreeItem)item);
        }
		private WritingSystemTreeItem MakeExistingDefinitionItem(IWritingSystemDefinition definition)
		{
			var item = new WritingSystemDefinitionTreeItem(definition, OnClickExistingDefinition);
			item.Selected = item.Definition == _setupModel.CurrentDefinition;
			return (WritingSystemTreeItem) item;
		}