branch node

基本解释

Near the center of each drawn transition is a branch node.
靠近每一个绘制转换中心的是一个分支节点。
A branch node identifies the decision points and is visually represented as a black box located on the associated arrow (transition).
分支节点识别决策点，并直观地表示为位于相关箭头（转换）上的黑框。
Next, we'll provide validation of the log-in by adding a conditional transition from the branch node to the Login view, which is used when the log-in is unsuccessful.
接下来，我们将通过添加从分支节点到 Login 视图的条件转换来提供登录验证，通常在没有成功登录时，使用这一操作。