nextcloud / server

		$groups = array();

		foreach ($this->backends as $backend) {

			$groupIds = $backend->getGroups($search, $limit, $offset);

			foreach ($groupIds as $groupId) {

				$aGroup = $this->get($groupId);

				if ($aGroup instanceof IGroup) {

					$groups[$groupId] = $aGroup;

				} else {

					$this->logger->debug('Group "' . $groupId . '" was returned by search but not found through direct access', ['app' => 'core']);

				}

			}

			if (!is_null($limit) and $limit <= 0) {

				return array_values($groups);

			}

		foreach ($this->backends as $backend) {

			$groupIds = $backend->getUserGroups($uid);

			if (is_array($groupIds)) {

				foreach ($groupIds as $groupId) {

					$aGroup = $this->get($groupId);

					if ($aGroup instanceof IGroup) {

						$groups[$groupId] = $aGroup;

					} else {

						$this->logger->debug('User "' . $uid . '" belongs to deleted group: "' . $groupId . '"', ['app' => 'core']);

					}

				}

			}

		}

		$this->cachedUserGroups[$uid] = $groups;