public void Flush (GRContextFlushBits flagsBitfield--- = 0---)

 public void ClipPath (SKPath path, SKRegionOperation operation--- = 1---, bool antialias = false)
 public void ClipRect (SKRect rect, SKRegionOperation operation--- = 1---, bool antialias = false)
 public void DrawColor (SKColor color, SKXferMode mode--- = 1---)

public void GetValidSubset (ref SKRectI desiredSubset);

 public bool HasSubset { get; ---set;--- }
-public SKRectI Subset { get; set; }
+public SKRectI? Subset { get; set; }

public bool Close ();

-static public void MapRect (ref SKMatrix matrix, out SKRect dest, ref SKRect source)
+ public void MapRect (ref SKMatrix matrix, out SKRect dest, ref SKRect source)

public SKPictureRecorder (IntPtr handle, bool owns);