Interface provides an interface for adding and retrieving services, handling events related to designer state, detecting whether a designer is currently loading, and managing components or designer transactions.

• 接口提供了一个用于执行以下操作的接口:添加和检索服务,处理与设计器状态相关的事件,检测设计器当前是否正在加载,以及管理组件或设计器事务。