UnityEngine.Graphics.Internal_SetNullRT C# (CSharp) Method

        private static extern void Internal_SetNullRT();
        [MethodImpl(MethodImplOptions.InternalCall)]

 internal static void SetRenderTargetImpl(RenderTexture rt, int mipLevel, CubemapFace face)
 {
     if (rt)
     {
         Graphics.SetRenderTargetImpl(rt.colorBuffer, rt.depthBuffer, mipLevel, face);
     }
     else
     {
         Graphics.Internal_SetNullRT();
     }
 }