Code checker updates

classes/global_navigation_wrapper.php

@@ -237,11 +237,11 @@ public function load_generic_course_sections(\stdClass $course, \navigation_node
      * @param \navigation_node $sectionnode
      * @param \section_info $section
      * @param array $activities An array of activites as returned by see global_navigation::generate_sections_and_activities()
-     * @param \stdClass $course The course object the section and activities relate to.
+     * @param \stdClass|null $course The course object the section and activities relate to.
      * @return array Array of activity nodes
      */
     protected function load_section_activities(\navigation_node $sectionnode, \section_info $section, array $activities,
-                                                \stdClass $course = null): array {
+                                                ?\stdClass $course = null): array {
         // CHANGED ABOVE: Use section info instead of number.
         global $CFG, $SITE;
         // A static counter for JS function naming.

lib.php

@@ -609,12 +609,12 @@ public function set_sections_preference(string $preferencename, array $sectionid
     /**
      * Set and return the format section preferences.
      *
-     * @param string $preferencename preference name
-     * @param int[] $sectionids affected section IDs
+     * @param string|null $preferencename preference name
+     * @param int[]|null $sectionids affected section IDs
      * @return array of preferences indexed by section ID
      *
      */
-    protected function fmt_set_get_sections_preferences(string $preferencename = null, array $sectionids = null): array {
+    protected function fmt_set_get_sections_preferences(?string $preferencename = null, ?array $sectionids = null): array {
 
         $course = $this->get_course();
         $sectionsextra = $this->fmt_get_sections_extra();