default services conflit ?

old.vendor/composer/installers/src/Composer/Installers/Plugin.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace Composer\Installers;
+
+use Composer\Composer;
+use Composer\IO\IOInterface;
+use Composer\Plugin\PluginInterface;
+
+class Plugin implements PluginInterface
+{
+    private $installer;
+
+    public function activate(Composer $composer, IOInterface $io)
+    {
+        $this->installer = new Installer($io, $composer);
+        $composer->getInstallationManager()->addInstaller($this->installer);
+    }
+
+    public function deactivate(Composer $composer, IOInterface $io)
+    {
+        $composer->getInstallationManager()->removeInstaller($this->installer);
+    }
+
+    public function uninstall(Composer $composer, IOInterface $io)
+    {
+    }
+}