public CIContextOptions setWorkingColorSpace(CGColorSpace workingColorSpace) {
   set(Keys.WorkingColorSpace(), workingColorSpace.as(NSObject.class));
   return this;
 }
 public CIContextOptions setOutputColorSpace(CGColorSpace outputColorSpace) {
   set(Keys.OutputColorSpace(), outputColorSpace.as(NSObject.class));
   return this;
 }