code: public void setRevokedStart(Date revokedStart) throws InvalidArgumentException {
          if (revokedStart == null) {
              throw new InvalidArgumentException("Date can't be null");
          }
          queryParms.put("revoked_start", Util.dateToString(revokedStart));
      }
docs: Get certificates that have been revoked after this date
  
  @param revokedStart Revoked after date
  @throws InvalidArgumentException Date can't be null