class Foo
{
    private $config;

    /**
     * @param Config $config
     */
    public function __construct(Config $config) {
        $this->config = $config->getData();
    }
}

config:
    ...

foo:
    class: KopernikusLeBundleServiceFoo
    arguments:
        - @config

foo:
    class: KopernikusLeBundleServiceFoo
    arguments:
        - [@config, getData]

config:
    ...

foo:
    class: KopernikusLeBundleServiceFoo
        arguments:    ["@=service('config').getData()"]

<?php
class FooContainer implements YourContainerInterface {
    public static function get() {
        // Config logic here
        return new Foo($config);
    }
}