code: public static VectorClock makeClockWithCurrentTime(Set<Integer> serverIds) {
          return makeClock(serverIds, System.currentTimeMillis(), System.currentTimeMillis());
      }
docs: Generates a vector clock with the provided nodes and current time stamp
  This clock can be used to overwrite the existing value avoiding obsolete
  version exceptions in most cases, except If the existing Vector Clock was
  generated in custom way. (i.e. existing vector clock does not use
  milliseconds)
  
  @param serverIds servers in the clock