@Override
  public GroupDescription.Basic get(final AccountGroup.UUID uuid) {
    if (!handles(uuid)) {
      return null;
    }

    String groupDn = uuid.get().substring(LDAP_UUID.length());
    CurrentUser user = userProvider.get();
    if (!(user instanceof IdentifiedUser) || !membershipsOf((IdentifiedUser) user).contains(uuid)) {
      try {
        if (!existsCache.get(groupDn)) {
          return null;
        }
      } catch (ExecutionException e) {
        log.warn(String.format("Cannot lookup group %s in LDAP", groupDn), e);
        return null;
      }
    }

    final String name = LDAP_NAME + cnFor(groupDn);
    return new GroupDescription.Basic() {
      @Override
      public AccountGroup.UUID getGroupUUID() {
        return uuid;
      }

      @Override
      public String getName() {
        return name;
      }

      @Override
      @Nullable
      public String getEmailAddress() {
        return null;
      }

      @Override
      @Nullable
      public String getUrl() {
        return null;
      }
    };
  }
 private boolean isLdapUUID(AccountGroup.UUID uuid) {
   return uuid.get().startsWith(LDAP_UUID);
 }