error CS0117: ‘EditorSceneManager‘ does not contain a definition for ‘IsGameObjectInMainScenes‘

Unity 报错

error CS0117: ‘EditorSceneManager’ does not contain a definition for ‘IsGameObjectInMainScenes’

报错原因：

Post Pressing版本太低

解决方案：

Window -> Package Manager，打开Package Manage界面，然后升级 Post Pressing