declare type for arguments of anonymous functions for v2.7

Author: DQNEO

Loader/XmlFileLoader.php

@@ -23,6 +23,7 @@
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
 use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+use Symfony\Component\DependencyInjection\Extension\ExtensionInterface;
 use Symfony\Component\ExpressionLanguage\Expression;
 
 /**
@@ -667,7 +668,7 @@ private function validateExtensions(\DOMDocument $dom, $file)
 
             // can it be handled by an extension?
             if (!$this->container->hasExtension($node->namespaceURI)) {
-                $extensionNamespaces = array_filter(array_map(function ($ext) { return $ext->getNamespace(); }, $this->container->getExtensions()));
+                $extensionNamespaces = array_filter(array_map(function (ExtensionInterface $ext) { return $ext->getNamespace(); }, $this->container->getExtensions()));
                 throw new InvalidArgumentException(sprintf(
                     'There is no extension able to load the configuration for "%s" (in %s). Looked for namespace "%s", found %s',
                     $node->tagName,

Loader/YamlFileLoader.php

@@ -23,6 +23,7 @@
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
 use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+use Symfony\Component\DependencyInjection\Extension\ExtensionInterface;
 use Symfony\Component\Yaml\Exception\ParseException;
 use Symfony\Component\Yaml\Parser as YamlParser;
 use Symfony\Component\Yaml\Tag\TaggedValue;
@@ -652,7 +653,7 @@ private function validate($content, $file)
             }
 
             if (!$this->container->hasExtension($namespace)) {
-                $extensionNamespaces = array_filter(array_map(function ($ext) { return $ext->getAlias(); }, $this->container->getExtensions()));
+                $extensionNamespaces = array_filter(array_map(function (ExtensionInterface $ext) { return $ext->getAlias(); }, $this->container->getExtensions()));
                 throw new InvalidArgumentException(sprintf(
                     'There is no extension able to load the configuration for "%s" (in %s). Looked for namespace "%s", found %s',
                     $namespace,