* Sets the proposed value of the {@link Instance} (downcast as a
* {@link MutableProposed}, unwrapped the proposed value from a
* {@link ObjectAdapter}.
*/
public void set(final ObjectAdapter owner, final ObjectAdapter newValue) {
final MutableProposedHolder proposedHolder = getProposedHolder(owner);
final Object newValuePojo = newValue.getObject();
proposedHolder.setProposed(newValuePojo);
}