<?php declare(strict_types = 1); namespace Installer; use Composer\Composer; use Composer\IO\IOInterface; use Composer\Plugin\PluginInterface; class Plugin implements PluginInterface { public $version = 'installer-v9'; public function activate(Composer $composer, IOInterface $io) { $io->write('activate v9'); } public function deactivate(Composer $composer, IOInterface $io) { $io->write('deactivate v9'); } public function uninstall(Composer $composer, IOInterface $io) { $io->write('uninstall v9'); } }