/** @since Available in iOS 4.0 and later. */
 public CMTextFormatDescriptionRect getDefaultTextBox() {
   if (has(Keys.DefaultTextBox())) {
     CFDictionary val = get(Keys.DefaultTextBox(), CFDictionary.class);
     return new CMTextFormatDescriptionRect(val);
   }
   return null;
 }
 /** @since Available in iOS 4.0 and later. */
 public CMTextFormatDescriptionExtension setDefaultTextBox(
     CMTextFormatDescriptionRect defaultTextBox) {
   set(Keys.DefaultTextBox(), defaultTextBox.getDictionary());
   return this;
 }