Sort of get config to work

src/DependencyInjection/PcmIconExtension.php

@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Pcm\IconBundle\DependencyInjection;
+
+use Pcm\IconBundle\DependencyInjection\Configuration;
+use Symfony\Component\Config\FileLocator;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Extension\Extension;
+use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
+
+class PcmIconExtension extends Extension
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function load(array $configs, ContainerBuilder $container): void
+    {
+        $loader = new YamlFileLoader($container, new FileLocator(__DIR__.'/../../config'));
+        $loader->load('services.yaml');
+
+        $configuration = new Configuration();
+        $config = $this->processConfiguration($configuration, $configs);
+
+        $definition = $container->getDefinition('pcm_icon.icon_extension');
+
+        $definition->replaceArgument('$directories', $config['directories']);
+        $definition->replaceArgument('$palletes', $config['palletes']);
+        dump($configs);
+    }
+}