[statistics] Add type annotations and a couple comments

1 files changed, 4 insertions, 4 deletions

diff --git a/modules-available/statistics/inc/statisticsfilterset.inc.php b/modules-available/statistics/inc/statisticsfilterset.inc.php
index a38f9d3f..e4117a8c 100644
--- a/modules-available/statistics/inc/statisticsfilterset.inc.php
+++ b/modules-available/statistics/inc/statisticsfilterset.inc.php
@@ -38,7 +38,7 @@ class StatisticsFilterSet
 		$this->cache = compact('where', 'join', 'args');
 	}
 	
-	public function isNoId44Filter()
+	public function isNoId44Filter(): bool
 	{
 		$filter = $this->hasFilter('Id44GbStatisticsFilter');
 		return $filter !== false && $filter->argument == 0;
@@ -57,7 +57,7 @@ class StatisticsFilterSet
 	 * @param string $type filter type (class name)
 	 * @return false|DatabaseFilter The filter, false if not found
 	 */
-	public function hasFilter($type)
+	public function hasFilter(string $type)
 	{
 		foreach ($this->filters as $filter) {
 			if ($filter->isClass($type)) {
@@ -71,7 +71,7 @@ class StatisticsFilterSet
 	 * @param string $type filter type key/id
 	 * @return false|DatabaseFilter The filter, false if not found
 	 */
-	public function hasFilterKey($type)
+	public function hasFilterKey(string $type)
 	{
 		if (isset($this->filters[$type]))
 			return $this->filters[$type];
@@ -85,7 +85,7 @@ class StatisticsFilterSet
 	 * @param string $permission permission to use
 	 * @return bool false if no permission for any location, true otherwise
 	 */
-	public function setAllowedLocationsFromPermission($permission)
+	public function setAllowedLocationsFromPermission(string $permission): bool
 	{
 		if (!Module::isAvailable('locations'))
 			return true;