extern public static Shader GetCustomShader(UnityEngine.Rendering.BuiltinShaderType type);
 extern public static UnityEngine.Rendering.BuiltinShaderMode GetShaderMode(UnityEngine.Rendering.BuiltinShaderType type);
 extern public static void SetCustomShader(UnityEngine.Rendering.BuiltinShaderType type, Shader shader);
 extern public static void SetShaderMode(UnityEngine.Rendering.BuiltinShaderType type, UnityEngine.Rendering.BuiltinShaderMode mode);