code: 	Class<?> convertGroup(Class<?> originalGroup);
  
  	/**
  	 * Returns a set with {@link GroupConversionDescriptor}s representing the
  	 * group conversions of this cascadable.
  	 *
  	 * @return A set with group conversion descriptors. May be empty, but never
  	 *         {@code null}.
  	 */
  