eZ\Publish\Core\REST\Server\Controller\User::loadUserGroupsOfUser PHP Method

    public function loadUserGroupsOfUser($userId, Request $request)
    {
        $offset = $request->query->has('offset') ? (int) $request->query->get('offset') : 0;
        $limit = $request->query->has('limit') ? (int) $request->query->get('limit') : 25;
        $user = $this->userService->loadUser($userId);
        $userGroups = $this->userService->loadUserGroupsOfUser($user, $offset >= 0 ? $offset : 0, $limit >= 0 ? $limit : 25);
        $restUserGroups = array();
        foreach ($userGroups as $userGroup) {
            $userGroupContentInfo = $userGroup->getVersionInfo()->getContentInfo();
            $userGroupLocation = $this->locationService->loadLocation($userGroupContentInfo->mainLocationId);
            $contentType = $this->contentTypeService->loadContentType($userGroupContentInfo->contentTypeId);
            $restUserGroups[] = new Values\RestUserGroup($userGroup, $contentType, $userGroupContentInfo, $userGroupLocation, $this->contentService->loadRelations($userGroup->getVersionInfo()));
        }
        return new Values\CachedValue(new Values\UserGroupRefList($restUserGroups, $request->getPathInfo(), $userId), array('locationId' => $user->contentInfo->mainLocationId));
    }