class in UnityEditor.ShaderKeywordFilter
Enable or disable shader keyword filter attributes based on the graphics API.
You can use GraphicsAPIConstraintAttribute to enable or disable filter attributes based on the GraphicsDeviceType, so you can filter shader keywords differently on different graphics APIs.
Use ApplyRulesIfGraphicsAPIAttribute and ApplyRulesIfNotGraphicsAPIAttribute to make your code more readable.
| GraphicsAPIConstraintAttribute | Enable or disable shader keyword filter attributes based on the graphics API. |