/** @since Available in iOS 4.0 and later. */
 public CVImageBufferAttributes setGammaLevel(double gammaLevel) {
   set(CVImageBufferAttribute.GammaLevel, CFNumber.valueOf(gammaLevel));
   return this;
 }
 /** @since Available in iOS 4.0 and later. */
 public CVImageBufferAttributes setFieldCount(int fieldCount) {
   set(CVImageBufferAttribute.FieldCount, CFNumber.valueOf(fieldCount));
   return this;
 }