[Components] Convert to native return types

Author: wouterj

AbstractExtension.php

@@ -98,7 +98,7 @@ public function getTypeGuesser(): ?FormTypeGuesserInterface
      *
      * @return FormTypeInterface[]
      */
-    protected function loadTypes()
+    protected function loadTypes(): array
     {
         return [];
     }
@@ -115,10 +115,8 @@ protected function loadTypeExtensions(): array
 
     /**
      * Registers the type guesser.
-     *
-     * @return FormTypeGuesserInterface|null
      */
-    protected function loadTypeGuesser()
+    protected function loadTypeGuesser(): ?FormTypeGuesserInterface
     {
         return null;
     }

AbstractRendererEngine.php

@@ -61,10 +61,7 @@ public function __construct(array $defaultThemes = [])
         $this->defaultThemes = $defaultThemes;
     }
 
-    /**
-     * @return void
-     */
-    public function setTheme(FormView $view, mixed $themes, bool $useDefaultThemes = true)
+    public function setTheme(FormView $view, mixed $themes, bool $useDefaultThemes = true): void
     {
         $cacheKey = $view->vars[self::CACHE_KEY_VAR];
 
@@ -124,10 +121,8 @@ public function getResourceHierarchyLevel(FormView $view, array $blockNameHierar
      * Loads the cache with the resource for a given block name.
      *
      * @see getResourceForBlock()
-     *
-     * @return bool
      */
-    abstract protected function loadResourceForBlockName(string $cacheKey, FormView $view, string $blockName);
+    abstract protected function loadResourceForBlockName(string $cacheKey, FormView $view, string $blockName): bool;
 
     /**
      * Loads the cache with the resource for a specific level of a block hierarchy.