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diff --git a/vendor/drush/drush/src/Command/RemoteCommandProxy.php b/vendor/drush/drush/src/Command/RemoteCommandProxy.php
new file mode 100644
index 000000000..488f4033e
--- /dev/null
+++ b/vendor/drush/drush/src/Command/RemoteCommandProxy.php
@@ -0,0 +1,51 @@
+<?php
+namespace Drush\Command;
+
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Drush\Symfony\IndiscriminateInputDefinition;
+
+use Drush\Runtime\RedispatchHook;
+
+/**
+ * Create a placeholder proxy command to represent an unknown command.
+ * We use these only when executing remote commands that do not exist
+ * locally. We will let the remote end decide whether these will be
+ * "command not found," or some other behavior, as the remote end might
+ * have additional functionality installed.
+ *
+ * Also note that, for remote commands, we create the proxy command prior
+ * to attempting to bootstrap Drupal further, so the proxy command may
+ * be used in place of some command name that is available only for
+ * Drupal sites (e.g. pm:list and friends, etc.).
+ */
+class RemoteCommandProxy extends Command
+{
+    /** @var RedispatchHook */
+    protected $redispatchHook;
+
+    public function __construct($name, RedispatchHook $redispatchHook)
+    {
+        parent::__construct($name);
+        $this->redispatchHook = $redispatchHook;
+
+        // Put in a special input definition to avoid option validation errors.
+        $this->setDefinition(new IndiscriminateInputDefinition());
+
+        // Put in a placeholder array argument to avoid validation errors.
+        $this->addArgument(
+            'arguments',
+            InputArgument::IS_ARRAY,
+            'Proxy for command arguments'
+        );
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output)
+    {
+        $this->redispatchHook->redispatchIfRemote($input);
+        $name = $this->getName();
+        throw new \Exception("Command $name could not be executed remotely.");
+    }
+}