* @throws IllegalArgumentException If supplied {@code listItem} class is not valid child according
* to generated model.
*/
- <N extends Identifiable<K> & ChildOf<? super T>, K extends Identifier<N>> DataObjectModification<N>
+ <N extends Identifiable<K> & ChildOf<? super T>, K extends Identifier<N>> @Nullable DataObjectModification<N>
getModifiedChildListItem(@NonNull Class<N> listItem, @NonNull K listKey);
/**