There are certain cases where we dump the lock manager upon a lock acquisition timing out, for instance the RSTL acquisition for step down. However, since the acquisition has already timed out by this point, the state of the lock manager may have changed. It would be nice to be able to tell the locker to perform the lock manager dump before actually performing the timeout in cases this like. We could even make this a bit more general by providing a callback, so that the fatal assertion could be done at this point at well. Then we would have a more useful core dump.