public Collection<Role> findRoles(String id, String roleTypeName) throws IdentityException
{
checkNotNullArgument(id, "Group id or User name");
// checkNotNullArgument(roleTypeName, "RoleType name");
RoleType roleType = roleTypeName != null ? new SimpleRoleType(roleTypeName) : null;
return findRoles(createIdentityTypeFromId(id), roleType);
}