Strictly define the types for ModuleManagerInterface::isEnabled

Author: navarr

lib/internal/Magento/Framework/Module/Manager.php

@@ -4,6 +4,8 @@
  * See COPYING.txt for license details.
  */
 
+declare(strict_types=1);
+
 /**
  * Module statuses manager
  */
@@ -49,7 +51,7 @@ public function __construct(
     /**
      * @inheritdoc
      */
-    public function isEnabled($moduleName)
+    public function isEnabled(string $moduleName): bool
     {
         return $this->moduleList->has($moduleName);
     }

lib/internal/Magento/Framework/Module/ModuleManagerInterface.php

@@ -20,5 +20,5 @@ interface ModuleManagerInterface
      * @param string $moduleName Fully-qualified module name, e.g. Magento_Config
      * @return boolean Whether or not the module is enabled in the configuration
      */
-    public function isEnabled($moduleName);
+    public function isEnabled(string $moduleName): bool;
 }