It would be used to access the "has_vclock" flag.  I would guess it might be a bigger, server-side question as to how valuable the information is.  As to the naming, sadly I have a message called "get" and a series of functions which are called "get" and "set".  My naming standard is `riak_<message>_get/set_<field>`.  I could rename the message `fetch`, perhaps, but I was trying to match the underlying PBC names.