*
* @param subtree Subtree which configuration commit handler is interested it
* @param commitHandler Instance of user-provided commit handler
* @return Registration object representing this registration. Invoking {@link ObjectRegistration#close()}
*
* @param subtree Subtree which configuration commit handler is interested it
* @param commitHandler Instance of user-provided commit handler
* @return Registration object representing this registration. Invoking {@link ObjectRegistration#close()}