question: public TaskResourceRep hostVcenterUnassign ( URI hostId , URI eventId ) { return hostClusterChange ( hostId , NullColumnValueGetter . getNullURI ( ) , NullColumnValueGetter . getNullURI ( ) , true , eventId ) ; }
target:  Unassign host from a vCenter NOTE: In order to maintain backwards compatibility, do not change the signature of this method.