Merge branch '3.4' into 4.4

* 3.4:
  Fix CS

Author: fabpot

Extension/Extension.php

@@ -65,7 +65,7 @@ public function getNamespace()
      */
     public function getAlias()
     {
-        $className = \get_class($this);
+        $className = static::class;
         if ('Extension' != substr($className, -9)) {
             throw new BadMethodCallException('This extension does not follow the naming convention; you must overwrite the getAlias() method.');
         }
@@ -79,7 +79,7 @@ public function getAlias()
      */
     public function getConfiguration(array $config, ContainerBuilder $container)
     {
-        $class = \get_class($this);
+        $class = static::class;
 
         if (false !== strpos($class, "\0")) {
             return null; // ignore anonymous classes

Loader/Configurator/AbstractConfigurator.php

@@ -31,7 +31,7 @@ public function __call($method, $args)
             return $this->{'set'.$method}(...$args);
         }
 
-        throw new \BadMethodCallException(sprintf('Call to undefined method %s::%s()', \get_class($this), $method));
+        throw new \BadMethodCallException(sprintf('Call to undefined method %s::%s()', static::class, $method));
     }
 
     /**