mark classes as final and methods and properties as private

src/BatchClient.php

@@ -15,7 +15,7 @@
  *
  * @author Joel Wurtz <jwurtz@jolicode.com>
  */
-class BatchClient implements HttpClient
+final class BatchClient implements HttpClient
 {
     /**
      * @var HttpClient

src/Deferred.php

@@ -9,7 +9,7 @@
 /**
  * A deferred allow to return a promise which has not been resolved yet.
  */
-class Deferred implements Promise
+final class Deferred implements Promise
 {
     private $value;
 

src/HttpClientPoolItem.php

@@ -16,7 +16,7 @@
  *
  * @author Joel Wurtz <joel.wurtz@gmail.com>
  */
-class HttpClientPoolItem implements HttpClient, HttpAsyncClient
+final class HttpClientPoolItem implements HttpClient, HttpAsyncClient
 {
     /**
      * @var int Number of request this client is currently sending

src/HttpClientRouter.php

@@ -12,6 +12,8 @@
 /**
  * Route a request to a specific client in the stack based using a RequestMatcher.
  *
+ * This is not a HttpClientPool client because it uses a matcher to select the client.
+ *
  * @author Joel Wurtz <joel.wurtz@gmail.com>
  */
 final class HttpClientRouter implements HttpClient, HttpAsyncClient
@@ -26,19 +28,15 @@ final class HttpClientRouter implements HttpClient, HttpAsyncClient
      */
     public function sendRequest(RequestInterface $request): ResponseInterface
     {
-        $client = $this->chooseHttpClient($request);
-
-        return $client->sendRequest($request);
+        return $this->chooseHttpClient($request)->sendRequest($request);
     }
 
     /**
      * {@inheritdoc}
      */
     public function sendAsyncRequest(RequestInterface $request)
     {
-        $client = $this->chooseHttpClient($request);
-
-        return $client->sendAsyncRequest($request);
+        return $this->chooseHttpClient($request)->sendAsyncRequest($request);
     }
 
     /**

src/HttpMethodsClient.php

@@ -24,7 +24,7 @@
  * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
  * @author David Buchmann <mail@davidbu.ch>
  */
-class HttpMethodsClient implements HttpClient
+final class HttpMethodsClient implements HttpClient
 {
     /**
      * @var HttpClient