This is a sub-issue of #1800046: [META] Add missing type hinting to core docblocks focused on correctly adding @param and @return type hinting to the System module.
Documentation patches that include type hinting are time consuming to both review and commit because one must dig into the actual code to confirm that the type hints are both correct and complete. Hence, please be patient and try to limit type hint patches to covering only a limited number of docblocks (10-15 as a guess).
How to review this issue:
You can use phpcs this way to check for remaining @param and @return hint errors:
phpcs --standard="Drupal" --extensions="module/php,inc/php,php" --report-csv --ignore="core/modules/system/tests,core/modules/system/src/Tests" core/modules/system/ | grep -F $'Missing param\nReturn type missing'Note that this uses
--ignore to exclude test files, since those are handled in another issue: #2651280: Add missing type hinting to System module TEST docblocksRelated sprint issues: