This method reads sample business process steps from an externaltext file and adds a new activity diagram to the model that was passed as a parameter.
该方法从一个外部文本文档中阅读业务过程步骤示例，并向作为一个参数传递的模型，添加一个新的活动图。
2
In fact, your browser spends far more time converting your Web page into a DOM tree (a tree-like organization of nodes) and rendering those nodes visually than it does loading an externaltext file.