apply changes from the code review

Author: michalsn

src/Commands/ClearSettings.php

@@ -4,6 +4,7 @@
 
 use CodeIgniter\CLI\BaseCommand;
 use CodeIgniter\CLI\CLI;
+use CodeIgniter\Settings\Config\Settings;
 
 class ClearSettings extends BaseCommand
 {
@@ -33,10 +34,8 @@ public function run(array $params)
 
     /**
      * Gets a human-readable list of handler names.
-     *
-     * @param mixed $config
      */
-    private function getHandlerNames($config): ?string
+    private function getHandlerNames(Settings $config): ?string
     {
         if ($config->handlers === []) {
             return null;

src/Handlers/ArrayHandler.php

@@ -68,7 +68,7 @@ protected function hasStored(string $class, string $property, ?string $context):
     /**
      * Retrieves a value from storage.
      *
-     * @return mixed|null
+     * @return mixed
      */
     protected function getStored(string $class, string $property, ?string $context)
     {

src/Handlers/DatabaseHandler.php

@@ -59,7 +59,7 @@ public function has(string $class, string $property, ?string $context = null): b
      * read and stored the first call for each contexts
      * and then retrieved from storage.
      *
-     * @return mixed|null
+     * @return mixed
      */
     public function get(string $class, string $property, ?string $context = null)
     {

src/Handlers/FileHandler.php

@@ -58,7 +58,7 @@ public function has(string $class, string $property, ?string $context = null): b
      * To boost performance, all values are read and stored
      * on the first call for each class+context, then retrieved from storage.
      *
-     * @return mixed|null
+     * @return mixed
      */
     public function get(string $class, string $property, ?string $context = null)
     {