unity 让自定义 ui shader 支持 UGUI 的 Mask 功能

_wwzzxx: 打包会报错，怎么回事啊 ，2020.3版本 UnityEditor.BuildPlayerWindow+BuildMethodException: 15 errors Assets\Scripts\Tool\ChangeInspectorShow.cs(162,42): error CS0246: The type or namespace name 'SerializedProperty' could not be found (are you missing a using directive or an assembly reference?) Assets\Scripts\Tool\ChangeInspectorShow.cs(146,47): error CS0246: The type or namespace name 'SerializedProperty' could not be found (are you missing a using directive or an assembly reference?) Assets\Scripts\Tool\ChangeInspectorShow.cs(143,2): error CS0246: The type or namespace name 'CustomPropertyDrawer' could not be found (are you missing a using directive or an assembly reference?) 。。。