/** @since Available in iOS 4.0 and later. */
 public CVImageBufferAttributes setPreferredCleanAperture(
     CVImageBufferCleanAperture preferredCleanAperture) {
   set(CVImageBufferAttribute.PreferredCleanAperture, preferredCleanAperture.getDictionary());
   return this;
 }
 /** @since Available in iOS 4.0 and later. */
 public CVImageBufferAttributes setCleanAperture(CVImageBufferCleanAperture cleanAperture) {
   set(CVImageBufferAttribute.CleanAperture, cleanAperture.getDictionary());
   return this;
 }