/**
     * If this {@link SecurityRealm} supports a look up of {@link GroupDetails} by their names, override this method
     * to provide the look up.
     *
     * <p>
     * This information, when available, can be used by {@link AuthorizationStrategy}s to improve the UI and
     * error diagnostics for the user.
     */
    public GroupDetails loadGroupByGroupname(String groupname) throws UsernameNotFoundException, DataAccessException {
        throw new UserMayOrMayNotExistException(groupname);
    }

    /**
     * If this {@link SecurityRealm} supports a look up of {@link GroupDetails} by their names, override this method
     * to provide the look up.
     * <p/>
     * <p/>
     * This information, when available, can be used by {@link AuthorizationStrategy}s to improve the UI and
     * error diagnostics for the user.
     *
     * @param groupname    the name of the group to fetch
     * @param fetchMembers if {@code true} then try and fetch the members of the group if it exists. Trying does not
     *                     imply that the members will be fetched and {@link hudson.security.GroupDetails#getMembers()}
     *                     may still return {@code null}
     * @throws UserMayOrMayNotExistException if no conclusive result could be determined regarding the group existence.
     * @throws UsernameNotFoundException     if the group does not exist.
     * @throws DataAccessException           if the backing security realm could not be connected to.
     * @since 1.549
     */
    public GroupDetails loadGroupByGroupname(String groupname, boolean fetchMembers)
            throws UsernameNotFoundException, DataAccessException {
        return loadGroupByGroupname(groupname);
    }