private Iterator getGroupsForPrincipal(IAuthorizationPrincipal principal)
            throws GroupsException {
        IGroupMember gm = getGroupMemberForPrincipal(principal);
        return gm.getAncestorGroups().iterator();
    }
private Iterator getGroupsForPrincipal ( IAuthorizationPrincipal principal ) throws GroupsException { IGroupMember gm = getGroupMemberForPrincipal ( principal ) ; return gm . getAncestorGroups ( ) . iterator ( ) ; }
Hook into the Groups system by converting the <code>IAuthorizationPrincipal</code> to an
<code>IGroupMember</code>. Returns ALL the groups the <code>IGroupMember</code> (recursively)
belongs to.

@param principal - org.apereo.portal.security.IAuthorizationPrincipal
@return java.util.Iterator over Collection of IEntityGroups