/** @since Available in iOS 4.0 and later. */
 public NSDictionary<NSString, NSObject> getSampleDescriptionExtensionAtoms() {
   if (has(Keys.SampleDescriptionExtensionAtoms())) {
     NSDictionary<NSString, NSObject> val =
         get(Keys.SampleDescriptionExtensionAtoms(), NSDictionary.class);
     return val;
   }
   return null;
 }
 /** @since Available in iOS 4.0 and later. */
 public CMFormatDescriptionExtension setSampleDescriptionExtensionAtoms(
     NSDictionary<NSString, NSObject> sampleDescriptionExtensionAtoms) {
   set(Keys.SampleDescriptionExtensionAtoms(), sampleDescriptionExtensionAtoms);
   return this;
 }