Switched to using proper callables in Views controller

When just passing method name, it is not immediately obvious that it will be used as a method call later on. Using a callable we also make it easier for tools to pick up that it actually is a callable.

Author: Steveb-p

src/lib/Server/Controller/Views.php

@@ -37,6 +37,7 @@ public function __construct(SearchService $searchService)
      */
     public function createView(Request $request)
     {
+        /** @var \Ibexa\Rest\Server\Values\RestViewInput $viewInput */
         $viewInput = $this->inputDispatcher->parse(
             new Message(
                 ['Content-Type' => $request->headers->get('Content-Type')],
@@ -45,9 +46,9 @@ public function createView(Request $request)
         );
 
         if ($viewInput->query instanceof LocationQuery) {
-            $method = 'findLocations';
+            $method = [$this->searchService, 'findLocations'];
         } else {
-            $method = 'findContent';
+            $method = [$this->searchService, 'findContent'];
         }
 
         $languageFilter = [
@@ -62,7 +63,7 @@ public function createView(Request $request)
         return new Values\RestExecutedView(
             [
                 'identifier' => $viewInput->identifier,
-                'searchResults' => $this->searchService->$method(
+                'searchResults' => $method(
                     $viewInput->query,
                     $languageFilter
                 ),