UnityEngine.GL.INTERNAL_CALL_Viewport C# (CSharp) Method

        private static extern void INTERNAL_CALL_Viewport(ref Rect pixelRect);
        private static void Internal_Clear(bool clearDepth, bool clearColor, UnityEngine.Color backgroundColor, float depth)

 public static void Viewport(Rect pixelRect)
 {
     GL.INTERNAL_CALL_Viewport(ref pixelRect);
 }