title: Symfony 3.4 logger service
body: <p>When I called <code>logger</code> service get this information message  in log file it's worked but write this message in the log file:</p>
  
  <blockquote>
    <p>php.INFO: User Deprecated: The "logger" service
    is private, getting it from the container is deprecated since Symfony
    3.2 and will fail in 4.0. You should either make the service public, or stop using the container directly and use dependency injection
    instead. {"exception":"[object] (ErrorException(code: 0): User
    Deprecated: The \"logger\" service is private, getting it from the
    container is deprecated since Symfony 3.2 and will fail in 4.0. You
    should either make the service public, or stop using the container
    directly and use dependency injection instead. at
    /home/****/###/PROJECT/vendor/symfony/symfony/src/Symfony/Component/DependencyInjection/Container.php:275)"}
    []</p>
  </blockquote>
  
  <p>My symfony version: 3.4.1</p>