+ (nullable CGImageRef)getLinkedCGImage:(LTRasterImage *)image error:(NSError **)error
image
The LTRasterImage specified by the image.
The CGImageRef that the specified RasterImage is linked to. Returns null when there is no linked image.
You can avoid making a copy of the actual image data when converting to / from an CGImageRef using the ConvertToImageOptions.LinkImage flag.