code: @Override
      public Builder fetch(String name) throws InvalidClaimException {
          if (JwtUtils.isNullEmpty(name)) {
              String err = Tr.formatMessage(tc, "JWT_INVALID_CLAIM_ERR", new Object[] { name });
              throw new InvalidClaimException(err);
          }
          String sub = claims.getSubject();
          if (JwtUtils.isNullEmpty(sub)) {
              // TODO
              // Tr.warning
              // We can not really get to registry without valid user name
          } else {
              Object obj = null;
              try {
                  obj = JwtUtils.fetch(name, sub);
              } catch (Exception e) {
                  // TODO Auto-generated catch block
                  // Tr.warning
                  // e.printStackTrace();
              }
              if (obj != null) {
                  claims.put(name, obj);
              }
          }
          return this;
      }
docs: /*
  (non-Javadoc)
  
  @see com.ibm.ws.security.jwt.internal.Builder#fetch(java.lang.String)