* In other words, it is completely acceptable to observe
* a {@link DataObjectModification}, while the state observed before and
* after- data items compare as equal.
*
* @param changes Collection of change events, may not be null or empty.
*/
* In other words, it is completely acceptable to observe
* a {@link DataObjectModification}, while the state observed before and
* after- data items compare as equal.
*
* @param changes Collection of change events, may not be null or empty.
*/